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smiffy · 08-06-2008, 06:26 AM

hi guys,

im building a engine for a 50 class, however its a bit of a cheat.

the spec is:

takegawa 50mm crank
powroll 15:1 hc piston
takegawa h/d oil pump
takegawa c/r gearbox
takegawa r10 cam
takegawa 18mm carb kit
stock 50 head

to make the setup work i have had to cut the base of the sleave off about 5mm so that the conrod doesnt touch the side.

however the increase in stroke length has meant the piston skirts come out the barrel by 4mm at bdc.

do you think this is a problem?

need someone with some real tech knowledge here!!!!!

the engine will be running at full tilt 12,000 rpm for an hour at a time, a cant afford for the piston to come through the side of the jug.

PLEASE NOTE IM USING 98 OCTANE WITH 10% METHANOL MIX

08-06-2008, 06:26 AM	#1 (permalink)
smiffy PM Newbie Join Date: May 2008 Posts: 68	50cc cheater engine hi guys, im building a engine for a 50 class, however its a bit of a cheat. the spec is: takegawa 50mm crank powroll 15:1 hc piston takegawa h/d oil pump takegawa c/r gearbox takegawa r10 cam takegawa 18mm carb kit stock 50 head to make the setup work i have had to cut the base of the sleave off about 5mm so that the conrod doesnt touch the side. however the increase in stroke length has meant the piston skirts come out the barrel by 4mm at bdc. do you think this is a problem? need someone with some real tech knowledge here!!!!! the engine will be running at full tilt 12,000 rpm for an hour at a time, a cant afford for the piston to come through the side of the jug. PLEASE NOTE IM USING 98 OCTANE WITH 10% METHANOL MIX Last edited by smiffy; 08-06-2008 at 06:28 AM.