Author Topic: "X" dimension [st300 factory]  (Read 325 times)

suzzi9

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"X" dimension [st300 factory]
« on: February 23, 2021, 09:16:40 AM »
Hi, i couldn't find anywhere specs info about that dimension in the net. Does somebody has that knowledge here? In parts book i can see a lot of gaskets with different thickness. Factory version has smaller cylinder - 78,5mm so im not sure if "x" dimension from basic st300 will be the same?
Thanks

alang

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Re: "X" dimension [st300 factory]
« Reply #1 on: February 23, 2021, 07:38:15 PM »
All 300 enduro have 72mm
Bore and stroke.  I think I'm running
Zero x dimension. Flush with
Side of piston / collections @ tdc
2017 Sherco 300 2T Factory
2016 Aprilia Tuono 1100 Factory
2019 Santa Cruz Tallboy Carbon R
Azle, Texas

suzzi9

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Re: "X" dimension [st300 factory]
« Reply #2 on: February 24, 2021, 12:36:12 PM »
but my bike is 300 trial. And my piston (size1) is 78,46mm so i belive cylinder (size1) is 78,50mm. This x dimension is quite important i dont want have unburned oil in exhaust or overheated piston. Do you suppose in trials is also x dimension=0 ?

alang

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Re: "X" dimension [st300 factory]
« Reply #3 on: February 25, 2021, 08:25:45 AM »
oops, trials has different bore.
I would think as long as you don't have a negative x dimension(piston edge above cylinder at tdc)
you should be ok
2017 Sherco 300 2T Factory
2016 Aprilia Tuono 1100 Factory
2019 Santa Cruz Tallboy Carbon R
Azle, Texas