• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Gs850 + boost?

thebrandonbeezy

thebrandonbeezy

Forum Mentor
A buddy of mine bought my old gs850 and is dead set on pushing about 6 to 8psi through it. The bike is a solid runner. But im worried about somthing coming apart and hurting him or some crap. Also im not gonna talk him out of it cause it'd be really cool to see it boost but. So what would be some weak points to check/ beef up? Clutch? Oil pump? It wont be a race bike so i dont think he'll need to weld the crank?
 
Stay away from the rich chocolate, it clogs up the pilot jets something awful.
product_thumb_original_single.png
 
If he's pulling the motor down then tell him to put a plate underneath the base gasket to lower the compression a tad (those aluminium road signs are a nice thickness - don't know how I know that.....)

Then boost the crap out of it.
 
thebrandonbeezy said:
So you guys really arnt concerned about it coming apart under boost?
Click to expand...
Personally, I think there is a LOT of tongue-in-cheek going on, but it's based on your picture and the description in your signature:
1980 gs1000g (current caf? crapola project)
Click to expand...


These engines are, indeed, rather bulletproof, but there are limits. Hillsy's suggestion to lower the compression just a bit is probably spot-on, but keep in mind that in stock form, the 850 is already just a bit under powered. Lowering the compression will make even less power until you get on boost, and in the real world, that will be a very small percentage of the time. What you will end up with is a huge, heavy bike (or what's left of it, based on your picture) that will have trouble getting out of its own way.

Yeah, most of the comments are based on the appearance. There isn't a whole lot of love here for "cafe" or "bobber" bikes. Most of that is because of the proliferation of poorly (or not-) engineered projects that are unsafe and uncomfortable. Simply looking at the basic concept of a "cafe" bike shows where so many go wrong. The original cafe racers did race from cafe to cafe. Any part of their bike that added weight without making it go faster or handle better got removed. Your turbo project will add a fair amount of weight. Yeah, it will make it go faster occasionally, but will just be dead weight most of the time.

There are many suggestions to "boost it" to increasing levels. I think they are meant to blow your bike up and save you from personal destruction. Personally, I say "don't boost it, we need the parts". :oops:
 
yeah the 850 is in rough shape, I sold it a year and a half ago to a kid who kept it in a barn the entire time and never road it. sadly it got banged around wile in that barn and stripped down. then I heard it was for sale and convinced my buddy leon to buy it. now as for the half assedness that most caf?/bobber builds get neither of these bikes will fall into that category. my buddy just got the 850 3 days ago and hasn't really gotten to "beautifying" it and as for my 1000 caf? bike itll probably never be pretty but it wont be unsafe or dangerous or half assed. just need to know the original question. is the solid running low mile 850 going to take 6-8 psi of boost. and with all the weight stripped off the turbo should bring it to around stock weight?
 
After it's boosted, twist it up to around nine grand and dump the clutch.
 
Those two bikes look ... um, rather undermaintained, and most folks around here find the bobber crowd a bit less than ideal when it comes to focusing on building a bike right ("let's cut **** off and weld **** where it doesn't belong"). So, when you asked about what we will suppose is a turbocharging application, you may have opened yourself up to some Spinal Tappishness.
 
Also, on a serious note, where is he sourcing the turbo? Hopefully not cobbled together from some Mustang SVO corpse.
 
No, a t25 is planned at the moment with i think he said a Harley carb? Yeah at the moment theyre rough. My 1000 sat for a year when the previous owner past away from cancer. The 850 i explained in a previous post. Both bike are coming along from how the were a week ago though. But i think ill just post up how the turbo turns out after its done since most on here seem to be against it.
 
thebrandonbeezy said:
No, a t25 is planned at the moment with i think he said a Harley carb? Yeah at the moment theyre rough. My 1000 sat for a year when the previous owner past away from cancer. The 850 i explained in a previous post. Both bike are coming along from how the were a week ago though. But i think ill just post up how the turbo turns out after its done since most on here seem to be against it.
Click to expand...

It's just a waste of time to put a turbo on. People have way too much time on their hands. I am sure his turbo is going to be nicely done, might as well have him get the grinder and sawsall out and continue the "customization" when he's done with the turbo.
 
Does he have any experience at all with turbos, or is this just a fascinating project?

I have no idea whether a T25 would be the proper unit to use, but even within the T25 line, you have to specify the turbine and scrolls for the expected airflow. You can't simply use a turbo based on engine displacement, it has to be based on airflow.

Can't necessarily fault the Harley carb, either. It was reported that a Harley carb was used on the Toyota that I had turboed over 40 years ago. After dialing in the jetting, it ran like a champ.

Good luck with the project, keep us posted.

.
 
its sad that I asked a legitimate question and I get a bunch of sarcastic answers. why ruin a thread with ignorance. ohh well lets all act like ass holes because someone asks a legitimate question that we don't like. :clap: I didn't ask for an opinion when I do youll know it.
 
You must log in or register to reply here.

Similar threads

S
A one year rider and a 46 year old sport touring motorcycle - 1979 GS850
2
Replies
20
Views
444
Grimly
Grimly
Chuck78
Mikuni RS36 carbs on a 502cc GS425 too big? WERA or AHRMA??? vs CR31/33
2
Replies
22
Views
954
Chuck78
Chuck78
T
1978 GS400X street tracker build
2
Replies
25
Views
2K
theironlung1976
T
S
Suzuki XN85 Turbo (GS650 with turbo?)
Replies
16
Views
3K
dorkburger
dorkburger
I
82 GS1100GL Need some carb help
2
Replies
32
Views
2K
isaacson06
I
Back
Top