Stoker motor

doomedgame

Member
Jan 26, 2017
158
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Well just spent $150 on a stroker kit for my bike will post pictures as I build it

48mm bore lined
4mm+ stroker crank
 

doomedgame

Member
Jan 26, 2017
158
16
18
ga
The piston will be the hard part with this project the dome is a little different so will have to reshape the dome in the head more then likely sticky sandpaper on the dome of the piston work it in the head by hand maybe.

But on the plus side it's windowed and thinner rings
 

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doomedgame

Member
Jan 26, 2017
158
16
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old bearing is stuck on the old crank so had to order new barrings went with SKF. This project is on hold till they come in.
 
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crassius

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Sep 30, 2012
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one can sometimes pass a long drift punch thru hole in journal to hammer bearing off from backside
 

crassius

Well-Known Member
Sep 30, 2012
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bummer, seen that a lot - much of the reason I don't recommend splitting the case for non-mechanics
 

cannonball2

Well-Known Member
Oct 28, 2010
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Colonial Coast USA.
Interesting build.
By the add it indicates the piston is a non stocker. Where is the pin located in relation to the stock A/B pistons? I assume the jug is a stock sleeved unit? Do you know which one, gt5 maybe? All this will come into play setting it up. With the larger displacement and the reeds should be a real torque monster.

I have interest in this build as I am about to start a Frankenstein build using the 54mm Stihl piston/cylinder on a 40mm bottom end, and will have to make some of the same mods among others to make it work.
 

doomedgame

Member
Jan 26, 2017
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It's a stock (but ported) jug that has had the cyclinder bored out of it then sleeved I do not know what motor the jug was from as it doesn't matter as its been setup for that stroke.
 

cannonball2

Well-Known Member
Oct 28, 2010
3,662
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Colonial Coast USA.
Guess we won't really know what it's going to take to accommodate the stroke until you start the build. Jug spacing I am assuming. Between the spacing and the reeds being so far out of the intake crankcase compression will suffer. Consider stuffing the cases. If the piston has clearance to extend out of the jug with out hitting the crank that will help, that's why it's relieved I guess.