Messages

1

Vintage Two Strokes / 83 it250 sluggish

« on: July 06, 2013, 02:44:52 AM »

what should the compression be ? and whats causing the black oily crap leaking out the exhaust at the exhaust port? these are tough to get a good seal from expansion chamber pipe to cylinder...... thanks for all the help 

2

Vintage Two Strokes / 83 it250 sluggish

« on: July 05, 2013, 04:08:30 AM »

never checked my squish clearance, can I do it without removing the head? or should i just remove the base gasket and use 3 bond and check for interference?
I can tell you that anything past 1/4 throttle under load she just bogs until it dies, unless I clutch it a bit than it takes off like wildfire.

3

Vintage Two Strokes / 83 it250 sluggish

« on: July 04, 2013, 04:45:13 PM »

I rebuilt an 83 it250, had the cylinder redone with nicasil, bike idles ok, and is very strong when the power band kicks in. in neutral it has great response, as soon as I get to second gear its boggs bad unless I work the clutch to let it hit the powerband. it has a new carb with factory jetting for this bike.
I get black oil build up leaking from the exhuast at the cylinder, has fresh 93 octane gas @ 40:1 mix compression is at 125 psi,
any ideas?
thanks