scooter wont pull

Messages 1 to 11 of 11.

scooter wont pull
10 April 2008, 8:19 PM

sparky
Joined 1 Apr 2008
7 posts

hi i have a yamaha aerox 50/70kit the bike isnt pulling any weight at all i have tryed new variater an rollers new belt new clutch any more ideas what could be wrong the problem started awhen my belt snapped when i was doing 30Mph thanks mark

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scooter wont pull
19 April 2008, 7:18 PM

Lonan
Joined 17 Jan 2008
105 posts

you might be getting no compression which would mean either you need new piston rings or new piston or a completely new 70kit.

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scooter wont pull
27 April 2008, 9:35 PM

sparky
Joined 1 Apr 2008
7 posts

hi could this problem b caused buy my piston rings have burnt or wat are the sighns of my piston rings have blown or headgasket

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scooter wont pull
28 April 2008, 1:42 PM

Lonan
Joined 17 Jan 2008
105 posts

Well the signs are no power, but the only way to know for sure is to tale the cylinder head off and check. The new belt could be the wrong size which could also cause this prob. Fitting new tuning parts however ain't gonna solve it. One thing i learned from probs with scoots is that one problem can be caused by a few different things.

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scooter wont pull
29 April 2008, 10:21 PM

Jim
Joined 21 Jan 2008
5 posts

I have same problem with 4 stroke engine. Was doing about 30 and belt snapped nnd jammed i the clutch mechanism.
New belt now gives me no pulling power. (max uphill speed 5mph)
One test is to put the bike on the main stand lift the rear wheel off the ground and see if it accelerates up through the variator mechanism with no road load on the wheel. If it does (and mine does) then I suspect the clutch bearing has gone also. I suspect this was damaged due to the sudden stopping of the clutch.
I think (someone correct me if I'm wrong but the needle bearing in the inner centre of the clutch assy should freely rotate in 1 direction and give "bite" in the other direction. If the bearing has gone then it rotates freely in both directions. Hence you are only getting partial drive from the clutch. This is only my estimation at this stage as I need to replace mine to see if this is the cause. (Item 12 in the picture).

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scooter wont pull
29 April 2008, 10:23 PM

sparky
Joined 1 Apr 2008
7 posts

i allready have tryed new clutch i am try piston rings at the moment

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scooter wont pull
30 April 2008, 8:35 AM

Jim
Joined 21 Jan 2008
5 posts

Let me know how the piston ring option goes as I may have to consider also

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scooter wont pull
30 April 2008, 8:36 AM

Jim
Joined 21 Jan 2008
5 posts

Further clarification - as I now understand it the inner bearing should be free both ways. So next I'm going to check if my clutch plates are glazed - I will rough them up a bit with a rasp to see if I can get better bite.

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scooter wont pull
30 April 2008, 12:25 PM

Lonan
Joined 17 Jan 2008
105 posts

You get bite in one direction, but this is caused by the piston giving bite due to compression or if your not getting good compression a lack of bite.

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scooter wont pull
27 May 2008, 5:43 PM

jj
Joined 27 May 2008
3 posts

I HAVE A GILERA SP 50CC BOUGHT FOR £300 LAST YEAR .IT USED TO B FAST ON PULL OFF AND NOT TO GOOD AT THE TOP END .THEN DECIDED TO BUY A TT RACING EXHAUST AND NEW ROLLERS, NOW ITS A LOT SLOWER ON PULL OFF BUT WHEN GET TO 40MPH I GET A NICE BOOST TO 57MPH WHATS MY PROBLEM? HOW DO I MAKE MY BIKE FASTER ON PULL OFF PLEASE HELP!!!!1

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scooter wont pull
27 May 2008, 6:04 PM

Rowe
Joined 21 Mar 2008
205 posts

lighter rollers!!!

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Messages 1 to 11 of 11.

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