|
|
Post by chim2588 on Jul 14, 2021 8:47:46 GMT -5
I've been doing a project scooter fo abcoupke of month.
50mm piston
69mm valves
19mm carb (32 & 87)
Sspg camshaft qmb139
After installing the camshaft the scooter doesn't wanna go faster than 30. Once I get to 8krpm she starts bogging out. Like trying to push but it can't. Has anyone experienced this issue.. im thinking could be jet related?
|
|
|
|
Post by 90GTVert on Jul 14, 2021 18:53:31 GMT -5
Have you tried a different main jet?
Have you ever had it over 8,000RPM before? If not, it may be rev limited. If you can secure it well enough to be safe, you may be able to put the scoot up on the center stand and rev it to see if it passes 8,000RPM. Again, just make sure you're safe. You don't want the rear wheel accidentally touching the ground so it takes off.
|
|
|
|
Post by scooter7878 on Jul 14, 2021 20:09:19 GMT -5
Did u install the cam after bbk kit? Was it running good with bbk and stock cam or everything was done at once? I put my cam on after my bbk kit and I needed to go up a jet size and I had already went up with the bbk also like said above it could be rec limited and I would double check the cam timing
|
|
jtalk
Scoot Member
Posts: 28
Location: Wisconsin
|
Post by jtalk on Jul 21, 2021 0:34:18 GMT -5
Check to make sure you didn't put the cam in backwards. Or 180 degrees off I mean! I did that when I first started.
|
|
|
|
Post by GrumpyUnk on Jul 21, 2021 12:16:22 GMT -5
jtalk, try doing the cam 180 off again. You will find that the crankshaft is at TDC when that happens.. Just rotate the crank 1 revolution, and the cam should align properly.
I would check that the cam is not one tooth off. THAT will affect the power developed, and the general 'happiness' of the engine. It will become a cranky old goat with the cam off by a tooth.
tom
|
|
|
|
Post by chim2588 on Jul 26, 2021 19:36:04 GMT -5
I could go up to 10k rpm with thebstock cam. I understand a naraku unrestricted cdi and she still ssporadic. I thought my spring could've being getting overloaded but I installed an sspg head to go with the cam. Swapped rocker arms to 64mm since the head is 64mm valves. The timing on the cam sounds good. No clanky sounds. I tried the cam a tooth off and forward and. I even took the head off to make sure I was at TDC & still doing it. Weird thing is ancleaned the carb and shell be fine for just one small ride sort of then start again. Im installing a new carb to see if there's any difference...
|
|
|
|
Post by scooter7878 on Jul 26, 2021 20:32:57 GMT -5
Check ur fuel tank, filter and hoses for debris that can be clogging the jets
|
|
|
|
Post by chim2588 on Jul 26, 2021 20:45:16 GMT -5
Changed all of it to helix clear lines and cleaned fuel tank 2 weeks ago. Added sea foam couple ofbdays ago
|
|
|
|
Post by scooter7878 on Jul 26, 2021 22:44:48 GMT -5
Changed all of it to helix clear lines and cleaned fuel tank 2 weeks ago. Added sea foam couple ofbdays ago . This started after only the cam was installed or u did bbk kit and cam at same time |
|
|
|
Post by steve1297 on Jul 27, 2021 3:38:10 GMT -5
I think it's probably the carb.
Put a carb for a 150cc scooter on there.
|
|
|
|
Post by chim2588 on Aug 1, 2021 1:01:32 GMT -5
Changed all of it to helix clear lines and cleaned fuel tank 2 weeks ago. Added sea foam couple ofbdays ago . This started after only the cam was installed or u did bbk kit and cam at same time yeah only started after installing the camshaft |
|
