I have a 1977D Yamaha xs 650. Its a sweet ride, but I think it could run a lot better than it currently does. My question to pose to you is, where should I start?
Here is some info to point you in the right direction.
- The engine runs fine, but idles a bit high once it warms up
- It backfires on the left side, could be because the inner sleave of the left headpipe is lose at one end.. but i dunno
- very occassionally when i use the kick start, it will blow the carbies right off.. yeah.. crazy huh
- For all I know it hasn't had its engine tuned or carbs look at in years.
If you can give me some helpful advice, especially if you think I should just bring it to a mechanic that would be great. I'm in Sydney, Australia if that helps too.
2007-04-11 00:19:57 · 5 answers · asked by dandelo84 2 in Cars & Transportation ➔ Motorcycles
--First fix the leaking head pipe. If you're having a hard time sealing it up, use "muffler tape". Available at auto parts stores.
--Change the spark plugs and adjust the valves.
--Yamaha Raptors had a problem with the carbs blowing off the manifolds. The cure was to replace the manifolds and gaskets.
--Syncronize the carbs and lower the idle.
2007-04-11 04:23:52 · answer #1 · answered by guardrailjim 7 · 0⤊ 0⤋
tuned exhaust and with that you will want to tune your carbs. An engine needs fire air and fuel if it has the wrong mix then bad running and back firing can happen. Make sure the carbs are working together and not doing there own thing. Usually a pro will have to do this because of tools and experience.
2007-04-11 03:30:17 · answer #2 · answered by 20/20 5 · 0⤊ 0⤋
Back fire and blowing the carby off sounds like you have an air leak in your inlet section of the carbies it could even be a crack in the inlet manifold I think the bike needs some mechanical help I'm in Melbourne.
2007-04-11 00:30:33 · answer #3 · answered by burning brightly 7 · 0⤊ 0⤋
That's right -- you can't tune a bike that has a leak!
Then check your ignition timing, cam chain tension, valve lash, and carb synch, in that order. That should get you on the right track.
2007-04-11 07:52:00 · answer #4 · answered by Yesugi 5 · 1⤊ 0⤋
well my friend what you have there is a section b33452 commenly known as a gas problem, if you catch a squirrell you can lube him up and slide him right into the gas tank, if you've ever seen star wars then you've seen the droids that repair the ships while their flying! this is basically what the squirrell will do, then you want to throw him a snorkell (to stay above the gas) and a pickle to eat!
good luck i hope this advice has been meaningful and worth your time!!
2007-04-11 01:09:34 · answer #5 · answered by yo 1 · 0⤊ 3⤋