Clutch Problems and A lot of Shaking on low rpm HELP!!

At the end of #2 I was thinking to myself: "This guy'd better post a video.". Glad to see you will...VERY helpful.

It sounds like you need to lubricate the drive gears, possibly the clutch hub bearings and you are running the engine too slow. 15 to 20 MPH is good for traveling slow, perhaps 10 MPH at the maximum slowness. At that speed the engine will be barely above idle speed. Any slower than that and the engine will be running too slow and it will buck and surge and struggle to stay running.
Squeeze in the clutch when you are traveling less than 10 MPH.
1 to 2 MPH (!??)... I am surprised that the engine will run at all. It should have already stalled at that speed.
If you do not give it any throttle you should expect it to not have any power and it should slow down until you experience exactly what you are experiencing.
If you wish to travel really slow all the time you will need to get a large rear sprocket, like a 70 tooth.

All the sounds that I heard were perfectly normal. There was no squeaking.
There is a very distinct ( some folks feel that it is loud) gear whine that all chinagirls make when you are traveling down the road under engine power. This is due to the fact that the gear teeth are straight cut gears. The gear teeth are cut straight across from one side to the other as opposed to helical cut gears which do not make this sound.
Older model Harley-Davidsons are notorious for straight cut gear whine.
Have you ever heard the whine of a car or truck traveling in reverse? Straight cut gear whine once again. They all do it no matter what they are installed in.

Trying to lubricate the gears with excessive grease will not help quieten down the gear noise, only make a bigger grease mess inside the gear case.
Listen to other folk's videos and you will hear the same gear whine in all of them.

Also, check to see if the flower nut is dragging on the inside of the clutch cover.
If it is that will add a scraping sound to the gear whine.
All 3 of my chinagirls had the flower nut scraping and they finally scraped themselves until there was clearance and the scraping stopped. You can install a thicker gear cover gasket to space the cover farther away from the flower nut if it really bothers you.

You can use sound deadening techniques to muffle the gear whine.
These are possibly the best around: http://www.sickbikeparts.com/catalo...ucts_id=140&osCsid=u2ck0c47iaflgjaq43d8tvv4g0

Here ia a thread on the subject: http://motorbicycling.com/showthread.php?t=14133&highlight=gear+noise

Thanks for posting a vid. I agree with GearNut; I perceive no abnormal noise, although the shaking you describe should be a concern...it seems that your engine is hitting your system's harmonic, and the increased amplitude of the vibration is rattling the whole bike. I would have a good look at your mounting studs/nuts and make sure they're properly torqued.

As for "noise", I have a veritable $#!+ ton of riding vids here you can compare against: http://www.youtube.com/user/CookieMcHaid

All the sounds I hear while it is idling seem fine to me.

You are not the first and won't be the last to think something is wrong with his or her engine when it is new, everyone I have built has had some gear whine. Some are worse than others my first engine was loud, the one I'm building now is fairly quite.

Tom I know the sound you are talking about, I had one that the small gear screw loosened up causing a pulsing noise.

I've found a similar problem with the clutch flywheel not seating square on the tapered shaft and making the whole clutch wobble excessively.

It's easy to get things off with the key and cause wobble unless you're careful to assemble things correctly. Take the time to check that the keys are straight and centered so the gears pull on straight. Don't just go gorilla on the puller, use some oil and be gentle when putting things back together. Only the last few turns should require much force to seat things.

2door said:

Whoever drilled this one must have had a bad day.

Click to expand...

Or a good night-before.
[insert drunk-smiley here]

Sexypena said:

Thanks for the advise ! This is my first build , I've never seen a motorized bike before in person I've only seen them online ,I'm probably the only person in my whole town that has one

I do have a another question on a side note ;have you guys done anything to your exhaust or changed it out ,anything like that?

Click to expand...

Do a forum search for expansion chamber, center of the page near the top.

Like this:
http://www.google.com/cse?cx=partne...#gsc.tab=0&gsc.q=expansion chamber&gsc.page=1