TS250R carburetor- inlet manifold alignment.

General discussion about Offroad two-stroke Suzuki motorcycles.

Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan

Post Reply
Frodo
Still in the Driveway
Posts: 2
Joined: Sat Jun 23, 2012 6:54 am
Country: GB
Suzuki 2-Strokes: TS250R

TS250R carburetor- inlet manifold alignment.

Post by Frodo »

I am in the process of rebuilding / renovating a 1971 TS250R.

On removing the carburetor, I have noticed that the spacer to cylinder head inlet is out of alignment by about 3mm. The spacer lines up with the carburetor OK.

I can't imagine that manufacturing tolerances when drilling/tapping the cylider head would be so poor to allow so much missalignment. Some 25mm into the cylinder head/barrel inlet there is the auto-lube injector, I'm thinking that the missalignment is there to induce some turbulence in the inlet and help in mixing the two stroke oil / petrol vapour.

Is there anybody out there with some knowledge of this? Have I got a problem that needs solving? Or is this how it should be?

All input will be greatfully received.
User avatar
H2RICK
AMA Superbike
Posts: 1659
Joined: Sun Oct 19, 2008 11:07 am
Country: CANADA
Suzuki 2-Strokes: GT550A, GSF1200SK6 currently
Location: Cowtown aka Calgary, Canada

Re: TS250R carburetor- inlet manifold alignment.

Post by H2RICK »

Frodo, those old engines weren't exactly "poster children" for modern manufacturing and/or tuning techniques. They did clean up their methods/designs later on, though.
If there is no evidence of bodgery by PO's, I'd leave it alone and ride it the way it is.
GT550A Mint & Original
H2A Semi-Hot Rod Built From A Basket Case
KZ650C2 Mint & Original...mostly
GSF1200SK6 Bandit...My LD Ride
Additional H2 projects In Boxes.....
MBD Sufferer
Post Reply