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-   -   ninja jx ,shim 30% ? (https://www.rctech.net/forum/nitro-off-road/354164-ninja-jx-shim-30%25.html)

Gen 12-23-2009 12:54 AM

ninja jx ,shim 30% ?
 
just got me new donk and want to know is it really necessary to install shim q
when running 30% nitro ,,,i want to keep max power cause im using in truggy or is it better to use ? ,is life greatly shortened by not using ?,,also do os venturis fit carby ?,,as this is a os engine

jmaxey51 12-23-2009 01:32 AM

i would put one on because it will last a good bit longer but a ninja has plenty of power even with the shim. we run a JPX 21 in our jammin truggy that everyone says is heavy and we just run 20%. i would get the shim and run 30% and it will have plenty of power.

jpalessi 12-23-2009 08:44 AM


Originally Posted by Gen (Post 6755105)
just got me new donk and want to know is it really necessary to install shim q
when running 30% nitro ,,,i want to keep max power cause im using in truggy or is it better to use ? ,is life greatly shortened by not using ?,,also do os venturis fit carby ?,,as this is a os engine

The engine comes stock shimmed for 30%. do not add the extra shim. yes os stacks will fit... i like the 8mm

s porter 12-23-2009 12:13 PM


Originally Posted by Gen (Post 6755105)
just got me new donk and want to know is it really necessary to install shim q
when running 30% nitro ,,,i want to keep max power cause im using in truggy or is it better to use ? ,is life greatly shortened by not using ?,,also do os venturis fit carby ?,,as this is a os engine

Run the extra (2 total) copper shim for breakin...Remove it after the engine loses pinch.

romax 12-23-2009 03:12 PM

Delete wrong post , sorry

jrwoodchuck 12-23-2009 05:34 PM


Originally Posted by s porter (Post 6756967)
Run the extra (2 total) copper shim for breakin...Remove it after the engine loses pinch.

+1
I did this, and I have no issues.


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