4mil 66.5 bore suggestion

[banshee9090]

I done my 4mil shee rebuild and this is the first time I rebuild bike such shee before I rebuild it was working well with toomey T6 exhaust pipe , 2 K&N w/out the airbox air filter cool head pre design, 22cc domes stuck carb., with 300 main jet ,long jet needle with the 5th groove, pilot jet 27.5 the elevation 1968 fit wither temp 80-90 F

Now guys if you have any suggestion or comments about my build pleas tell me

Pleas note my rebuild is boring cylinder for 66.5 vertex piston install 4mil cranck shaft 5mm long rod and cut dooms 22+2mm I did not do any porting for cylinder gas intake or cylinder exhaust discharge so what you suggest guys for me ?

 

best regaurd.

[spurdy]

I done my 4mil shee rebuild and this is the first time I rebuild bike such shee before I rebuild it was working well with toomey T6 exhaust pipe , 2 K&N w/out the airbox air filter cool head pre design, 22cc domes stuck carb., with 300 main jet ,long jet needle with the 5th groove, pilot jet 27.5 the elevation 1968 fit wither temp 80-90 F

Now guys if you have any suggestion or comments about my build pleas tell me

Pleas note my rebuild is boring cylinder for 66.5 vertex piston install 4mil cranck shaft 5mm long rod and cut dooms 22+2mm I did not do any porting for cylinder gas intake or cylinder exhaust discharge so what you suggest guys for me ?

 

best regaurd.

 

Your post is a little hard to read but I think I get the jist of your question. I would never put that kind of money into a motor running a set of 66.5mm bore cyls. A new top end on a good crank, maybe. If I were gonna go with a 4 mil I'd find a set of virgin jugs and start there. Porting for the 4 mil is also the only way to go. The spacer plate is another place for leaks and why increase displacement and stroke length if your gonna run stock timings? There is so much power to be had with good porting alone.

 

Just my 2 cents

 

SP

[banshee9090]

Your post is a little hard to read but I think I get the jist of your question. I would never put that kind of money into a motor running a set of 66.5mm bore cyls. A new top end on a good crank, maybe. If I were gonna go with a 4 mil I'd find a set of virgin jugs and start there. Porting for the 4 mil is also the only way to go. The spacer plate is another place for leaks and why increase displacement and stroke length if your gonna run stock timings? There is so much power to be had with good porting alone.

 

Just my 2 cents

 

SP

problem that When I start the motor warm up 5 min then I touch the throttle little, the motor stop and I think it gets hesitation, revving high, I start it up with the choke "on" also the motor stop I tray to adjust the air screw ,go for smaller pilot jet move the needle jet up and down but it get bad-[censored] ? I know I have some thing wrong with the jetting or exhaust and it will take some time to be fixed!

[banshee9090]

problem that When I start the motor warm up 5 min then I touch the throttle little, the motor stop and I think it gets hesitation, revving high, I start it up with the choke "on" also the motor stop I tray to adjust the air screw ,go for smaller pilot jet move the needle jet up and down but it get bad-[censored] ? I know I have some thing wrong with the jetting or exhaust and it will take some time to be fixed!

wow i it is ok now I found an fix the problem ,reason why, since i build my 4mil motor I use to run it every day for 1 hrs in idle in order to sit up the new motor and there was oil build up in the pipe coming from long time motor idle and that oil cause the motor to stop and gets hesitation when ever I run it and touch the throttle little but now as i said it is strong and runner. Sounds like you got a great combo going on , I will get my compression gauge and test then I will inform you guys about the details result of my bike testing

Thank you guys for your fast replay and useful feed back

Edited May 6, 2010 by banshee9090