1967 B100p project bike

MR.CHocko · Posted: Mon Aug 15, 2011 1:12 pm Post subject:

If it was me and this was my bike I would probably be checking everything. If I have to do the crank I may as well do new pistons, rings, cam chain,etc. Only because you may as well because you have the crank out. Before you go crazy there are some Suzuki mechanics who can tell you better then I can what is really going on.

pj_elia · Posted: Mon Aug 15, 2011 2:27 pm Post subject:

If its just the crank seal, I don't think I would need split the case. Just remove the clutch cover and oil pump drive gearbox and crank gear. Then pry out the seal and press one back in. Or do you think its the crankcase gasket between the halves? That would require a lot more work and might as well do a complete rebuild at that point.

Rizingson · Posted: Mon Aug 15, 2011 5:33 pm Post subject:

The good thing about 2-stroke singles is you only have two outside seals, which can be changed as you suggested. However I'd do a pressure/vacuum test on it before I changed them anyway. Search for testing methods on this forum or the internet for how to do it. No more than 6psi and 6 inches of vacuum is required.

mchalmers · Posted: Thu Aug 18, 2011 11:29 pm Post subject: Re: 1967 B100p project bike

pj_elia · Posted: Mon Aug 22, 2011 9:02 am Post subject: Re: 1967 B100p project bike

pj_elia · Posted: Wed Aug 31, 2011 12:08 pm Post subject:

Didn't test the crank seals yet, but I bought a set of seals anyway from Paul Miller. I've heard mixed reviews, but I saw them listed on ebay and took a chance. If I don't need them now, I will need them in the future. I received the NOS kickstarter from Thailand but still waiting on the gasket set from another Thailand seller. I tried running the bike again. If fired up right away but after thirty seconds or so, it dies down and becomes hard to start.

pj_elia · Posted: Mon Sep 12, 2011 7:57 am Post subject:

Well, I'm not positive that I tested it right, but the crankcase is holding 6 in of vacuum for two days. No leaking at all. What I did it to block the intake and exhaust ports with rubber stoppers. On the intake stopper I drilled a hole and inserted hose fitting that I attached to my mighty vac. I drew vacuum and its been holding. I moved the piston to a few different positions with no difference. I guess the seals are good?? Back to the drawing board.

Rizingson · Posted: Mon Sep 12, 2011 9:39 am Post subject:

Sounds like it's not seal problems, but back to the carb. If I were guessing I'd say that the fuel level is too low in the bowl. This could cause the idle jet to pick-up fuel barely at first (rough running) and then after speed, the fuel level is too low to be pulled in when you try to idle (instant stalling) But first make sure your homemade gasket is not catching on the float and that the needle valve is not sticking in the seat after it has been closed by the float.

pj_elia · Posted: Tue Sep 13, 2011 12:25 pm Post subject:

Rizingson,

Good points. I'll check that out. I may have over corrected the bowl. Also, if I let it sit for awhile it then starts up again pretty good and then completely dies after revving for a few seconds.

Thanks, will follow up in a few days.