Suzuki 2 Strokes

I'm about to start my rebuild of my T250 engine and I'm wondering if anyone knows the torque settings and sequence for the top and bottom engine casings.

Thanks
Paul

hi paul, there should be numbers cast into the crankcases which shows you the sequence to undo and redo all the bolts. i always take the top 4 bolts out last and replace them first. but be careful with all the m6 bolts as they are very easy to shear - they are getting on 50 years old don't forget. i always replace them with new stainless hex head bolts and copper grease them. can't find the torque settings at the mo, but it's pretty low if i find it, i'll post it up. if you can't find the numbers, they are just undone in as diagonal a sequence as you can manage, like top right, bottom left etc.
cheers, dd.

As Dolly says, the bolt holes have numbers near them to indicate the sequence. Suzuki's recommended specs for the crankcase bolts (which should all have the letter S on their heads) are:

6mm bolts: 5 to 7 lb-ft
8mm bolts: 10 to 17 lb-ft
10mm bolts: 18 to 29 lb-ft

(the measurement indicates the shank diameter, not the bolt head size)

The T250/T350 was based on the T305, which was based on the T20.
The T250/T350 shop manual is pretty skimpy on info. Some additional info is in the T305 manual & T20 manual.

The T500 crankcase bolt tightening order is on page 45 of the T500 shop manual.
I think later T500s have an additional bolt, so this isn’t exactly correct for the later motors.
The T500 bolt order should be a pretty good guide for your T250.

Shop manuals are here: https://www.oldjapanesebikes.com/mraxl_ ... /index.php