1980 - 1982 GS450 Carb Spec's (E, L, S, and T)

[pete]

I've been promising for ages to put up the correct factory carb spec's for the 450's from my factory repro. manual.

I have it here in front of me, and while I thought it covered all the '80's 450's, it only has the detailed spec's for the 1980 - 1982 models.

So here they are. Measurements are mm (in)

Type: Mikuni BS34SS
Bore Size: 34
ID Number: 44100 (Germany: 44120)
Idle: 1200 +/- 50 RPM
Fuel Level: 6.5 +/- 0.5 (0.26 +/- 0.02)
Float Height: 26.6 +/- 1.0 (1.05 +/- 0.04)
Main Jet: 117.5 (Germany: 112.5)
Jet Needle: 4C3-3 (Germany 4F29-4)
Needle Jet: Y-6 (Germany Y-2)
Pilot Jet: 17.5 (Germany 22.5)
Valve seat: 2.0
Pilot screw: 2.0

I hope that clears up all confusion for these! The Clymer is wrong!!!

I will also pass this info on to BassCliff to get his chart updated.

I also must mention that the Alpha Sports parts fiche lists the US models having a main jet of 115 and a Jet Needle as a 4C2, but this is not reflected in the factory manual at all, and in fact it explicitly states the above are for all countries except Germany where identified.

I'm going to guess that those are made slightly leaner for some emissions laws that probably only affected the bikes once they arrived in the US and so aren't reflected from the factory.

[wally]

Thanx Pete! It is going to come in handy on my bike shortly!

[pete]

Good stuff Wally, glad to be of help

[nikosg]

Does anyone have the specs for the gsx400f. BS26SS carbs... :s cant find mine anywhere and want to get hold of some before i decide to tear them down for a clean and put these damn o rings that have been sitting on my desk for 3 months lol

[pete]

Mate hit up eBay seller eClassic Bike, or something like that. See if he has a factory reproduction manual for your bike as well, that's where I got mine. $30 plus shipping cheap as chips and extremely helpful!