New member 157qmj stroker question By flaco (Read 572 times)

[flaco]

Hello everyone. New to this so not really sure how to post or anything but here we go. Im building a 157qmj 60mm light piston(srp) 3mm stroker crank 30mm cvk carb 115 variator 10g rollers and ncy clutch with 1500 springs and stock torque spring free flow ex pipe. Not sure with what cam to go with. Can anyone help me out. I would really appreciate it.

[Alleyoop]

Here you can see what each cam is capable of so choose the cam you want, more top end(HIGH RPM) or low end torque or something in between.
Alleyoop

[czmdiver]

Nov 8, 2015 16:05:02 GMT -6 flaco said:

Hello everyone. New to this so not really sure how to post or anything but here we go. Im building a 157qmj 60mm light piston(srp) 3mm stroker crank 30mm cvk carb 115 variator 10g rollers and ncy clutch with 1500 springs and stock torque spring free flow ex pipe. Not sure with what cam to go with. Can anyone help me out. I would really appreciate it.

SRP piston..   Is this a J&E custom someone made?
Take a Very Close look at the Pistons to fit Strokers, there Cutting off the Skirt to Clear the Crank.





The More you Stroke it the Harsher the Rod Angle and You Need all the Skirt you can get.
The NCY Piston on Left has had the Skirt Sawed off to clear that Crank


Here is a Properly Engineered Piston Skirt that Clears the Crank

[czmdiver]

Here are the Piston Weights of a few 61mm pistons

[flaco]

Wow thanks  thats going to help alot. Im in Puerto Rico and here it top secrect info when it comes to gy6's. Big market for them here.

[flaco]

Scooter racing parts (srp)

[czmdiver]

Nov 11, 2015 23:04:21 GMT -6 flaco said:

Scooter racing parts (srp)

Do you have a link for them?   I can't find anything.
Really would like to look at there product.