christoph21

Do you have the part numbers for the rocker rod seals and the cam seals? That would be really convenient for me thanks

I'd say. It finally came for this one and not the first Honda i had. . .

What? Nothing of that. I've already repaired that. The bike runs swell now and it's consistent.

Where did you get all your seals at? The leaking on mine is becoming less than it was but I'd like to replace the cam seals most likely when i have the time.

I was going to tune up the carbs today but as i was letting the bike idle it just kinda fixed itself. I dunno, i kept the screws out 3.5 turns and everything was great. I put on 60 miles and when i got back it was revving clean and idle perfectly.

I'll keep that in mind. I'll be checking that out first thing sunday hopefully

Yeah i figured i needed to keep turning. I have the screws about 3.5 turns out from bottom and i still noticed a little sticking at the 3k line but it comes back down. I think i'll take it out another half turn and that should do it because it's running pretty good right now aside from the 3k thing.

All right. I took the idle mix screws out 2.5 turns like you said. I started it up. It was a good low idle then i gave it some throttle and it went back up and hung at 3500, 4000 RPM or so. What should I do? Should I keep turning the screws out by a half turn and trying again?

Unscrew the idle mixture screw? I take it that's what you meant. Any tips on removing the cap?

Well, the bike DID run great. I'm have idling and revving issues again. There are no cracks in the carb boots now after I siliconed them. The jets are clear and floats are set accordingly. I have NOT looked at the venturi slides. I suspect one has a bad vacuum seal. This would lead to a high idle/rev problem yes?

Anybody know of a recurring oil leaking issue with and 81 ( or comparable) xs400? the bike has been sitting for 15-20 years inside, stored free of gas and after running it for a day it leaks oil considerably. Do you think it just needs time for the seals to become moist again and expand?

Yeah I forgot to connect the hose to the carb boot. I was anxious after cleaning the carbs out so when it didn't start i panicked and jumped on here. thankyfully it was a quick fix

Nevermind. I fixed everything just fine. Damn vacuum petcock...

Hello all. I have recently restored my third bike, a 1981 Yamaha xs400, and I just got it started up today for the first time. Currently, the bike starts right up with the push of the ignition switch, but does not idle on it's own. Also, when holding the throttle at one point, the bike can sometimes rev up higher and higher on it's own. I just cleaned all the jets in the carbs, floats and everything else EXCEPT the venturi slide as the screws were in rough shape. The venturi seem good though because the carb was already pretty clean when i got it and they slide pretty smooth. Any specific methods to remedy this? I know I probably need to adjust the idle screw but i'm not familiar with yamahas quite yet so a walkthough would be great. thanks

That is such an improvement