Time to play. There's no replacement for displacement.

[GreasyChris]

50% of chamber surface area. Page 41Jennings: Two-Stroke Tuner's Handbook - tuners.pdf

Thanks. I'll have to pop the head off and measure it again. I think it's pretty close tho going off my math skills and memory. Both are getting sketchy lol.

 

[Mcdonns]

I finally finished the stroker engine this weekend. I attached the reed block to the cylinder using 1/16 roll pins to lock and center it on to the cylinder and a 5 mm bolt threaded down thru the top fin and lots of JB weld.View attachment 90473View attachment 90474
The final specs on the engine are
Exhaust widened to 29mm
Exhaust raised to 24.9mm (173°)
Transfers 32mm (130°)
Blowdown 21°

The piston has been windowed and polished along with the exhaust port. I removed the bridges in the transfer ports and owned them up leaving the little wing tips at the bottom to direct the charge towards the intake side. And went with a high compression 6cc Puch cylinder head. Squish gap is set at .7mm
View attachment 90475View attachment 90476View attachment 90477View attachment 90478View attachment 90479View attachment 90480View attachment 90481

BEAUTIFUL!!!

 

[FNTPuck]

Lookin good!

 

[GreasyChris]

Forgot tho mention I raised the jug 2.4 mm to accept the 42mm crank. I have. 8mm base gaskets and used 3 and a 1.2mm copper head gasket to get .7mm squish.

 

[gary55]

Forgot tho mention I raised the jug 2.4 mm to accept the 42mm crank. I have. 8mm base gaskets and used 3 and a 1.2mm copper head gasket to get .7mm squish.

Forgot to mention. f***in A. bet this Mo Fo Runs Sweet.

 

[CrazyDan]

Wish you were in western america, would love to see you at the races.

 

[GreasyChris]

Wish you were in western america, would love to see you at the races.

I wish we had races here in canada, I think that would be a blast.