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Home > Help Needed / General Tech Chat > O/T cylinder wall thickness

Dangerous

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2521 Posts
Member #: 417
Post Whore

Swindon

13th Nov, 2006 at 10:42:42pm

I have had a pit bike for a few months,In my quest for more power I am thinking of getting it bored from 54.5mm to 60mm(going from 124cc to 161cc)It's a aircooled 4 stroke engine similar to a honda 50/70/90 range

This will only leave 2mm thickness between the cylinder and the head bolts

Do you think it will be ok


Metro turbo weekend driver,Mini turbo in the making again!



BENROSS

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9812 Posts
Member #: 332
Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

14th Nov, 2006 at 10:02:35am

i would not be concerned on the bores

but its the stud holes may pull out if the torque on them is high

give it a go bri

Edited by BENROSS on 14th Nov, 2006.






Dangerous

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2521 Posts
Member #: 417
Post Whore

Swindon

14th Nov, 2006 at 04:01:55pm

I was thinking heat distortion,the 4 studs screw in at the crankcase,pass straight through the barrel and nuts on top of the head


Metro turbo weekend driver,Mini turbo in the making again!



BENROSS

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9812 Posts
Member #: 332
Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

14th Nov, 2006 at 04:07:29pm

give it a go you have only a barrel and gaskets and piston to lose

i bet you will be fine





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