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1979 suzuki gs425e

  • Thread starter Thread starter lmrmllr89
  • Start date Start date
lmrmllr89 said:
Well I haven't done anything with the bike in a about a week now......I got the exhaust and all the boots for the carbs......I just need the time to install everything......

I was reading the manual and on the 425 there should be an access door to the oil pump screen......there doesn't seem to be one on mine.....anyone else know anything about this?
Click to expand...

Weird... the 450's have nothing like that, you can only access the screen by taking the sump cover off.

I just looked through the 425 fiche on Alpha Sports' website and can't even find the sump cover...
 
According to my clymer manual the 400 and the 425 s both have it.....its about the size of the oil filter door and directly to the back of it.........theres a circle stamped there on mine but no opening
 
lmrmllr89 said:
According to my clymer manual the 400 and the 425 s both have it.....its about the size of the oil filter door and directly to the back of it.........theres a circle stamped there on mine but no opening
Click to expand...

Aaaah... maybe the earlier ones had it and they changed the casing for the '79 year?
 
Even weirder... perhaps it was a cost cutting exercise from the 400's then? Who knows what went through the Suzuki engineer's mind? ;)
 
Yea who knows.....I'm curious though if any of the other 425s around here have it
 
So I tried to install the exhaust today and it doesn't seem to want to fit on......anyone have any experience with the mac 2 into one system on the 425
 
Can't help you on that one I'm afraid... what seems to be the issue? are you not able to get the headers to separate enough to go around the frame and into the exhaust ports maybe?
 
I can get the headers on....they come apart.....but when I have that angle right it pushes the muffler into the wheel.....but Im gonna work with it some more later....I just didn't have very much time.....it came off a 78 400 so it should work.....
 
Weird... coming off a 400 it definitely should work!

Pop a thread in the exhaust forum if you haven't already... I'm sure there's someone on here with a Mac on a 450... might have been Charlie G come to think of it...
 
So i did get the exhaust fitted. Pics to come......got the carbs back in and put a little gas in it......it started pretty easy.....easier than before I redid the carbs.....ran for a little....definitely needs some adjustments......the left pipe was twice the temperature of the right pipe......hoping the adjustments will fix that ...but am planning on doing a compression test soon.......am making a temporary gas tank...probly just a bottle of some kind ....will it hurt if it is just a free flow or should it have some kind of valve on it.....
 
Last edited:
lmrmllr89 said:
So i did get the exhaust fitted. Pics to come......got the carbs back in and put a little gas in it......it started pretty easy.....easier than before I redid the carbs.....ran for a little....definitely needs some adjustments......the left pipe was twice the temperature of the right pipe......hoping the adjustments will fix that ...but am planning on doing a compression test soon.......am making a temporary gas tank...probly just a bottle of some kind ....will it hurt if it is just a free flow or should it have some kind of valve on it.....
Click to expand...

Sounds promising :)

First thing you'll want is a carb synch to make sure they're sucking fuel and air evenly. Lean will make it run hot I believe. Compression test is a good idea of course. Can't remember but have you checked your valve clearances?

Here's my temporary tank... a whipper snipper fuel tank with a bit of fuel hose shoved in the bottom and a plain on/off fuel tap:

IMG_4343.jpg


Without the fuel tap is fine but disconnecting it from the carbs if it's not empty could be interesting... also make sure it's not too high up or the force of gravity on the fuel could cause it to overload the float valve spring and cause it to overflow.
 
i havent checked the valve clearances yet due to there being only 6800 miles on it....but will do it if you really think that could be causing that problem
 
cowboyup3371 said:
Valve clearances should be checked roughly every 4000 miles anyway.
Click to expand...

Yup, and that can affect your carb sync etc. as well, and typically you do the valves before anything else.

You may open her up only to find it's in spec, but personally I'd rather do that than do everything else only to find I had to open her up and repeat all the sync'ing again...
 
Pete,
Try and find one of those old red, rubber, Australian Army enema bags. They come with a hose and valve. Now that would give your bike some real character. One word of caution, never take anything I say, seriously.
Niels
 
one other thing i forgot to mention in my last post...after running it the other night i pulled the plugs out and they had traces of liquid on them....why and what is causing that....is it just to rich or is it another problem

well i ordered that valve cover gasket and the breather gasket.....should be here next week sometime......started taking the vavle cover off....got all the bolts loose and ready to be taken out but ran out of time....amazingly enough all the bolts and screws came loose without having to drill any out.....made me very happy......
 
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