|
|
Post by rzsmith on Nov 27, 2017 23:24:34 GMT -5
Hello folks,
I am enjoying everyone's help here, and have a new question!
So i posted the brand in the Subject, It is a 4 stroke.
I was running 50-55 EASY with what i assumed was the destricted CDI,
going 35 now after the belt broke
As im tearing this poor little engine apart, it seems they destricted the CDI, Left a cold air intake on
Needle was never touched.
I have ordered at 72cc BBK but what else could i do temporarily to improve performance, I am happy with 40mph I have 2 other vehicles just slowly am falling in love with the Scooter life.
Could there be exhaust restrictions, Or carb?
|
|
|
|
Post by 90GTVert on Nov 28, 2017 6:31:32 GMT -5
If you were doing 50-55MPH "EASY" then I'd have to say there are no restrictions to worry about. The CVT may be an issue since fiddling about in there caused the 20-25MPH drop and that's where I'd focus first for getting speed back. I suppose another possibility would be that a belt broke and it over-revved and there was contact between valves and the piston. Seems unlikely with it running 40MPH again though.
A performance cam may get you more power. Sometimes they rob too much dynamic compression though and results end up negligible.
|
|
|
|
Post by GrumpyUnk on Dec 26, 2017 23:17:31 GMT -5
apples, oranges, lemon meringue pie. What are we comparing?
So it goes 50-55 easy... then only 25-30, a 20-25mph drop... and now it goes 35.
Sorry, it seems the reported mph is inconsistent. To know what it is doing, you have to compare speed under similar conditions, at least the same stretch of road.
One thing not mentioned is how much cleanup was required after the belt failure. Is it possible there are strands, chunks, or pieces of belt that got tangled in the variator or clutch? Either or both could affect how things work.
tom
|
|
|
|
Post by lilpinny on Dec 27, 2017 22:57:39 GMT -5
What Tom said.
(Fair warning, not familiar with this scooter, advice might not be applicable)
Also, when it’s working one way and then it starts doing something else, first question is what changed? You took apart the CVT to replace the belt. So I agree with admin that I’d look in there to make sure you have the right belt on it and put it all back together correctly. Check your varilator weights and the spacers are all in the right place and didn’t come loose when swapping the belt.
The limiter is based on rpms so if your cranking more rpms for some reason you could be hitting it quicker. If the belt is too big you’ll over rev and never get into gear.
I’d make sure you are comparing apples to apples and use gps for your speed tests. I’d also install a cheapo tachometer (just temporarily) that wraps around the spark plug line. Then hit the same stretch of road and keep track of your speed and rpms.
|
|
