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GS750EX 81 to 83 GS750ES Engine

  • Thread starter Thread starter 922toms
  • Start date Start date
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922toms

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Has anyone took a 1981 GS750EX engine and installed it in a 83 GS750ES Frame? Thanks Tom Would it fit with modifications? Thanks Tom
 
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That would be a downgrade. The 2nd gen 750 engine is the only one that isn't bullet proof, plus it's heavier than gen 3.
 
81 gs750ex engine to 83 gs750es frame

81 gs750ex engine to 83 gs750es frame

Would this fit? Thanks Tom
 
Tom, ANYTHING can be MADE to work! Which part of the above posts are you not getting?! NOT a good motor to use! Ray.
 
There is nothing wrong with that engine

There is nothing wrong with that engine

There is nothing wrong with a GS750EX engine... I have essentially the same engine which had some subtle changes made by Suzuki for 1982 - the GS 750EZ. DOHC 16 valve... Everything I have read suggests that they are just as bulletproof as the highly regarded 1st generation 8 Valve GS engine - as well as powerfull and strong. The performance numbers are not that far off from the E and ES bikes of 83-85. I believe quarter mile on 81 was around 12.5; my 82 - 12.0 and the 83 engines ran their bikes at just under 12.0 (horsepower and torque - as well as flexibility pretty much the same between all 3)

Might it be he has access to the engine he is asking about at a good price and does not mind it being a couple of years (older) that what was originally in his bike...

Geez - why do people here have to impose their opinion ... Everyone has one but there is a time and place to share it. So this will be my time to share it...

If it is a bolt on fit - go for it... that is a sweet engine.
 
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Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr. 922toms,

You don't know me from Adam, but I would trust the opinions of Mr. Nessism and Mr. rapidray. I know these guys personally and they have been working on the GS line of bikes for decades. Sure, the second generation engines had some oiling issues but if you're diligent with your maintenance it should not be much of an issue. Right? ;)

Let me just offer you some documentation, dump a TON of information on you and share some GS lovin'. :D

I just stopped by to welcome you to the forum in my own, special way.
big_hi.gif


If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....
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Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Cleanup Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. This is what NOT to do: Top 10 Newbie Mistakes. Now let me roll out the welcome mat for you...

carpet.jpg


Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike! :D

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff
 
Yes, oiling issues. There have been a number of GSR members here that have wasted cranks and heads/cams/rockers because the oiling system is deficient. My understanding is that Suzuki promoted a fix back in the day where the oil pressure relief spring is shimmed by .060" to increase oil pressure. The oiling issues aren't bad enough to regulate the 2nd gen. 750's to the do-not-purchase list, but I wouldn't go though all the hassle of shoehorning one of those beasties into a 3rd gen chassis either.
 
GS 750ET, EX, and EZ

GS 750ET, EX, and EZ

My 1982 GS 750 has over 40,000 miles on it and by all accounts (that I have been privied to) it is still a baby. My understanding is that the oiling issues noted below only come into play for those who tend to be somewhat negligible in oil and oil filter changes.

I just bought a GS 850 and love this bike in the short time I have had it, but quite frankly the bite and performance of my 750E (with this 2nd generation engine) is truly head and shoulders more exhilirating.

Like many - the ones who have problems are the ones who voice opinions b/c they are the ones venting and needing "fixes." How many other 2nd Generation engines out there have gone on for many miles hassle free. Those generally are the ones you don't hear about b/c there is no reason to vent or asking for help. So from one who has had no problems and one who knows no one having problems - I say it is arguably one of the best UJM engines out there.

LOL ---- I never thought I would be having to defend 1980's GS engines - let alone on this site ... and I don't know either of the gentleman who gave their earlier opinions, knowledgeable or not to put down that engine (especially in the manner) and with the added sarcasm to an honest question by the one guy who asked "which part of the above posts are you not getting?! NOT a good motor to use!" is laughable....
 
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After being a Suzuki dealer mechanic DURING the early to late 80s I speak from EXPERIENCE about the 2nd gen 750 motors. They are not only a poor design in the oiling department but a poor choice for a transplant into ANY bike when there are much BETTER engines available! Again, this is EXPERIENCE speaking not opinion. Ray.
 
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xjandgs said:
My 1982 GS 750 has over 40,000 miles on it and by all accounts (that I have been privied to) it is still a baby. My understanding is that the oiling issues noted below only come into play for those who tend to be somewhat negligible in oil and oil filter changes.

I just bought a GS 850 and love this bike in the short time I have had it, but quite frankly the bite and performance of my 750E (with this 2nd generation engine) is truly head and shoulders more exhilirating.

.
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There have been several long term GSR members here that have suffered oil related failures on their 2nd gen 750 engines. These are NOT isolated incidents by thrashers. I strongly advise you to shim your oil pressure relief spring ASAP just to be safe. I also suggest use of a high quality synthetic oil, either diesel engine or motorcycle oil. I wouldn't use automotive grade oil in any GS, but particularly so in the 2nd gen 750.
 
rapidray said:
After being a Suzuki dealer mechanic DURING the early to late 80s I speak from EXPERIENCE about the 2nd gen 750 motors. They are not only a poor design in the piling department but a poor choice for a transplant into ANY bike when there are much BETTER engines available! Again, this is EXPERIENCE speaking not opinion. Ray.
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And I will back Ray on this ...I have the same back ground as Ray ...Suzuki dealer mechanic in the 80s.. A short stint with Suzuki RnD ... And where Ray has ended up in the drag racing world ...I end up in the road-racing world ...My experience with the 2nd gen gs 750 motor is the same as Rays ....

Just because you find a motor and its on hand ..Does not make it a good swap ...
 
Nessism said:
There have been several long term GSR members here that have suffered oil related failures on their 2nd gen 750 engines. These are NOT isolated incidents by thrashers. I strongly advise you to shim your oil pressure relief spring ASAP just to be safe. I also suggest use of a high quality synthetic oil, either diesel engine or motorcycle oil. I wouldn't use automotive grade oil in any GS, but particularly so in the 2nd gen 750.
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I am sure you do but would you also say you know SEVERAL who did not have any problems. That is the point I am making. Again, I never thought I would be defending a GS engine on this site...

Any way just exercising my voice here (it is just a counter view to the negative ones given below) - simply put.

10W 40 traditional oil works for me (and of course MOTORCYCLE OIL) - the automobile oil does not have the additives to entertain the fact that it is a wet clutch with the transmissing and the engine sharing oil from the wet sump for this engine... could not imagine using automotive oil, could you? Synthetic is fine for those who tend to lean away from regular maintenance - and all the power to those who use it - but I have never had the need for synthetic oil and should for any reason I have the problems you suggest, I am sure using synthetic instead of non synthetic oil won't remedy the problem.

All of the above being noted and what has been noted below --- I am done discussing this. Thanks.
 
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xjandgs said:
I am sure you do but would you also say you know SEVERAL who did not have any problems. That is the point I am making. Again, I never thought I would be defending a GS engine on this site...

Any way just exercising my voice here (it is just a counter view to the negative ones given below) - simply put.

10W 40 traditional oil works for me (and of course MOTORCYCLE OIL) - the automobile oil does not have the additives to entertain the fact that it is a wet clutch with the transmissing and the engine sharing oil from the wet sump for this engine... could not imagine using automotive oil, could you? Synthetic is fine for those who tend to lean away from regular maintenance - and all the power to those who use it - but I have never had the need for synthetic oil and should for any reason I have the problems you suggest, I am sure using synthetic instead of non synthetic oil won't remedy the problem.

All of the above being noted and what has been noted below --- I am done discussing this. Thanks.
Click to expand...


You might want to do some research on oil. Synthetic oil holds up to high temperatures much better than dino oil; it maintains it's film strength and doesn't flash off as readily at high temps. Given that our bikes are air cooled and the oil temperature will routinely crest 320+F during summer riding, and your engine has a weak oiling system which means only a minimum amount of oil may get to the top end during the heat of summer, using synthetic oil may very well save those camshafts and rocker arms, if you were to choose to use it that is. Do what you want but implying synthetic oil only useful to those that abuse their engines shows how uninformed you are.
 
Nessism said:
You might want to do some research on oil. Synthetic oil holds up to high temperatures much better than dino oil; it maintains it's film strength and doesn't flash off as readily at high temps. Given that our bikes are air cooled and the oil temperature will routinely crest 320+F during summer riding, and your engine has a weak oiling system which means only a minimum amount of oil may get to the top end during the heat of summer, using synthetic oil may very well save those camshafts and rocker arms, if you were to choose to use it that is. Do what you want but implying synthetic oil only useful to those that abuse their engines shows how uninformed you are.
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No it shows I am not some uptight anal A-Hole who tries to imply they are the know all and end all to motorcycles. Nor am I paranoid and a worrisome type as you. Synthetic oils may have their place and may even be better - I never implied they were not but in my opinion if you care for your stuff and take care of your stuff by doing regular maintenance you will be fine. I bought a Ford Ranger in 1989 and used non-synthetic oil from day one using Penzoil's basic oil and sold my truck with 190,000 of event free engine trouble - same with my Ford Focus with 170,000 miles put on by me. SIMPLY PUT - synthetic oil may be better but it is overkill and overstated just like those who have fuel that simply needs to run on unleaded gas but due to being WHAT I CONSIDER YOU TO BE, THE ANAL TYPE AND OVERLY WORRISOME AND CAUTIOUS (AND IN YOUR SPECIFIC CASE) - the type thinking your (you know what does not smell) probably put Premium unleaded in it and preach to everybody how much better it rides, how much better mileage you get and just how great and smart you THINK you are. Just b/c I asked you a question about the fact that I like others was getting the buzzing sound from my signal relay when my right blinker was on but not flashing showing I am willing and not afraid to ask questions when I need to, does not suddenly make you in my eyes somebody I look to for advice in other areas or consider to be the authority on other things (and quite frankly you are not even for the question I asked (as your answer was rather pathetic). So to those who chose synthetic oil, as I said before, more the power to them, but for some strange dude from Torrance to call into question my knowledge because I chose not to shows not only are you ignorant, but clearly you are stupid.:eek: You obviously do not like being called out even in the least bit which is why you had to rebut my very first post and could not stop rebutting ever since. I love playing with your type - actually kind of fun in sick perverse sort of way.

So Nessy (Superstar Rock Star) let's get to the basic facts (and forget all of the red herrings you have been tossing out there to avoid the simple truths). You can't stand a differing opinion than yours nor can you simply agree to disagree with someone. You think you are too good for that. You and another (especially that other person who I was referring to in my first post) said the 81 GS 750 Engine was "no good." I said (voicing the opposite opinion) it was a great engine. This should have been the end of it. Damn Man it is a UJM GS Engine from the 80's (come on - wake up). So why are we discussing same and why are you suddenly giving me all of this unsolicited advice? I will tell you why b/c obviously this site and your false belief that you are something special is the key to your pathetic life. Sorry but it is true. You can't stand an alternative opinion which has as much merit as your own and because of this try to attack by offering unwanted and unsolicited advice to somebody that (FOR WHAT IT IS WORTH) currently owns 4 motorcycles and has ridden non-stop since the age of 16 when purchasing a brand new Nighthawk 650 in 1983 - not to mention somebody that commutes 100 miles round trip every day in Maine from pretty much the end of March to the beginning of December (weighing on safety first based on roads being free of sand, snow and ice). It's pretty sad and quite honestly kind of pathetic don't you think that you feel the need to do this with me (and I am sure if I review your posts probably several others)? How do you have time to stay up all night doing this? I thankfully type fast. Do you? Or are you pecking away one key at a time to inflate your already overinflated ego. Off to work now... On my 1982 GS 750EZ DOCH 16 valve engine, 5 speed transmission, chain driven, with triple disc AND non-synthetic (MOTORCYCLE OIL)... (STILL LAUGH AT YOU AND YOUR "DON'T USE AUTOMOBILE OIL" IMPLICATION/ Like no s---t) ... fueled by regular unlead gas. So don't post back, but my gut is you will b/c you are ADDICTED TO THIS CRAP. Oh and don't be a sally and have one of your girlfriends post back either. To fight your fight for you. Thank Nessim for (hopefully) and finally absorbing some general truths not only about the wonderful GS engine but about your obviously very delicate psyche.
 
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xjandgs,

You are wrong on so many levels I don't even know where to begin...so I won't. Your rambling, illogical, filled with assumptions and insults post shows what kind of man you are. Lets leave it at that.

If you care to LEARN about GS bikes, and their specific strengths and weaknesses, you are in the right place. There are lots of people around here that have vast knowledge earned though doing, not assuming. Good luck.
 
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Nessism said:
xjandgs,

You are wrong on so many levels I don't even know where to begin...so I won't. Your rambling, illogical, filled with assumptions and insults post shows what kind of man you are. Lets leave it at that.

If you care to LEARN about GS bikes, and their specific strengths and weaknesses, you are in the right place. There are lots of people around here that have vast knowledge earned though doing, not assuming. Good luck.
Click to expand...

Nessism ...Mr Xjandgs is right on alot of points on oil ...And your points are off on a mess of them...Synthetic oil is all about the CAFE Law that no one ever knows about or looks up ...And goes nuts when ever I bring it up... And I have a vast knowledge earned by doing hands on and schooling ...Not part time hobby ...But full time job ...

Shocking what people will believe what car makers and oil company's say ..LOL...

Once a vehicle maker says "This new Tech is better then sliced bread" they never and can't back off it until they either Tech it so much it works out ..Or time moves on and new Tech replaces it ...Sh^%$T like Fords twin I beams ..Hondas oval pistons ...GM Quad 4..Mitsubishi composite trans blocker rings ..and I can go on for days ...

Do to my back ground I get to play in Aircraft Skunk works and a oil lab a good friend owns ...Shocking the BS oil companys and vehicle makers are feeding us...
 
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I could go on and on on my tirade, but I won't waste any more time with that. I will just share with you Nessim: to use an analogy, spring water may be better than tap water, but that does not mean one suddenly has to start drinking spring water or their hearts will explode. If you chose to pay for that right, go for it - again all the power to you. Just like synthetic oil. There are those vehicles that have oil changes recommended to be done at (for example) 5,000 mile intervals and you will always have that one guy who tells you he changes his oil religiously at 1,000 miles. I think to myself - "not only a waste of money but a waste of time" and you did your engine "no great favor," but I keep it to myself because that his choice and his right. Cars and motorcycles were and have been running just fine all these years without synthetic oil. If I thought it added "real" value I would buy it, but I don't believe it does so I choose not to. That certainly does not mean I am this REBEL riding around his GS in this dangerous game of testing fate. It means I trust a tried and proved lubricant to work its wonders in my engine. I also stated if suddenly my bike were to have this "so-called" known engine problem then I am fairly confident your recommendation of synthetic oil would make no difference whatsoever. So if you are the type that needs that to hold your hat on more the power to you. I don't.

So my ramblings and insults were to you, for one specific reason and one reason only, because they were warranted. I offered a different opinion: stating that the 1981 GS 750 16 valve engine is a good engine and "not a bad engine" as was stated in this string as this question was broached by someone (he got two responses by you and another). That really should have been it. Instead, I got from you a lecture and a tirade on what oil I should use for my bike, and all of this other egotistical advice. I am always appreciatiave of advice and as I stated earlier have no problem asking for advice in areas I need it. But being a guy who got his first street motorcycle at 16 and has been changing his own oil in all his vehicles for the past 29 years (accumalating massive amounts of mileage on several vehicles in the process) and not once using synthetic oil without ever have a problem and actually instead having quite the opposite effect of very well running engines (car and motorcycles), this information was not only not solicited but not wanted.

You then went onto call into question my knowledge because I said synthetics are a good choice for those who may tend to go outside of the recommended interval for an oil change as it does not break down the same as traditional fossil fuel.

That was uncalled for and honestly showed to me your character. I confess, my response was a bit sophmoric, but honestly I have no regrets b/c I have seen and read post by your type on here several times (thankfully most are not like you) and was sick of not responding.

So again in the end. This is a simple subject: A guy asks an opinion on whether a 1981 GS 750 egine would fit in his 83 GS 750 frame and he has two people that said that engine sucks. I told him I have a similar engine and it is good. Why from that you start offering all of this advice on oil to me and going on and on is a question only you can answer.

I hope you can honestly recognize a simple truth: Opinions are like *******s, everyone has one, but only *******s try to shove them down another's throat. (Made that up myself - I did)...

So that being said: Let's agree to disagree and move on from this subject and should either of us have a differing opinion in a post let's just recognize we have differing views and leave it at that.

Thank you.
 
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