I just bought an old 74' honda cb 360 to learn about bikes and how they run. I'm learning but am stuck on one problem. I bought the bike with a hole in one of the exhaust pipes because of rust. I know the scavenging process may be lacking because of this but the first day I rode it I hit 75mph without issue. My basic question is what can cause top speed lag?
Secondly, since I bought it I accidentally put reg. gas in it instead of the necessary premium. Obviously it ran very poorly and wouldn't shift into gear without dying. Second question, Since puting the good stuff back in, in my case, did that do something to cost me power? Thanks.
2007-07-30 11:24:29 · 10 answers · asked by Anonymous in Cars & Transportation ➔ Motorcycles
Start with cleaning the carbs. Then change the oil, plugs, points and condenser (or replace with electronic ignition if your rich). A hole in the exhaust can lead to the engine running lean which can be eventually bad for your engine. You should really replace that exhaust, with one from a salvage yard. Ask around, you might meet an old Honda guru who know if there is anything comparable to your cb 360 pipe. Happy wrenching!
2007-07-30 16:17:05 · answer #1 · answered by Shawn T 3 · 0⤊ 0⤋
Had one of those myself years ago - and I learned a lot about bikes - like avoid old nails - especially ones with points!
In good condition it'll do 85-90 mph.
Your problem is most likely electrical - points, plugs, or coils. If it'll rev right out in lower gears but not under load check the ignition timing first - you'll need a strobe timing light for this.
2007-07-30 21:54:48 · answer #2 · answered by no_bloody_ids_available 4 · 0⤊ 0⤋
It sounds like you need to fix the exhaust leak and clean (maybe re-jet) the carb. Adjust the valves. Check the spark plug and clean the air filter. I think that bike has points for the ignition. Check the points and replace them. They are cheap on e-bay.
Good luck
2007-07-30 11:29:11 · answer #3 · answered by mybuttstinks2001 5 · 0⤊ 0⤋
As stated previously that exhaust leak will lean out the a/f mix but even if that hasn't caused damage anytime you loose back pressure you gain low end but loose top end. Check plugs, points, timing, and clean the carb.
2007-07-30 23:57:44 · answer #4 · answered by Ron D 2 · 0⤊ 0⤋
You've probably got some crap in the carbs, or the filter.
Also, clean/change points and re-set timing.
It should have run ok with regular unleaded. It sounds like gunk started shifting around when you filled up. Restricted fuel flow will drop your top speed.
2007-07-30 14:41:10 · answer #5 · answered by Firecracker . 7 · 1⤊ 0⤋
It could definitely be a carb problem along with the exhaust. Probably need to get the exhaust replaced and clean the carbs out real good. Probably dont need to re-jet since its probably the exhaust messing with the carb.
2007-07-30 12:08:58 · answer #6 · answered by thehuskybear 1 · 2⤊ 0⤋
If the hole in the exhaust is up by the head, chances are you melted a valve, or the piston, by creating a lean mixture because of no backpressure in that pipe.
2007-07-30 12:08:31 · answer #7 · answered by Pup 2 · 0⤊ 1⤋
get a 4 into 1 exhaust convert from pionts to electronic ignition clean and synchronize the carbs change the plugs and wires.
2007-07-30 13:50:12 · answer #8 · answered by Anonymous · 0⤊ 1⤋
you better go over that old honda good running 75 mph check the bearing brakes bolts then worrie about timming and cleaning tank and carbs
2007-07-31 13:53:24 · answer #9 · answered by Nightrain 3 · 0⤊ 1⤋
Adjust the points & timing
2007-07-30 11:39:28 · answer #10 · answered by guardrailjim 7 · 0⤊ 0⤋