Ray or Rod DT55 1989 Carb Float Adjustment

[summers1996]

Rodbolt and Ray, thanks for the help on my engine rebuild. All worked out well. My concern is; when overhauling the carbs I found the floats adjusted very high. About 3/8 of an inch higher than the manual recommends. (not at all "level with the carb mating surface" as stated in the manual). I had a hole in a piston that I attributed to a lean condition. Now I have just re-adjusted my carbs to a leaner condition ...right? Do either of you know any reason that a carb float would be adjusted so high? It looked as though the floats were not even adjusted, just popped in right out of the box. Could a very rich condition cause a hole in a piston also??? These are Mikuni carbs.

 

[Canuck 16]

Re: Ray or Rod DT55 1989 Carb Float Adjustment

I rebuilt a set of Yam carbs last year, and I'm guessing the suzzy carbs are the same.<br />When your checking your float heights, your holding your carb upside down. So in your case, your floats were 3/8" high, roll your carbs over upright, your floats are now 3/8" low.<br /><br />Hope this helps... Canuck16.

 

[summers1996]

Re: Ray or Rod DT55 1989 Carb Float Adjustment

Maybe I'm an idiot. If I turn the bowl upsidedown the adjustment tab will not touch the valve. The float will just flop down. ....Or.. should I push the float up till it touches the valve and measure it from there?

 

[Ray Neudecker]

Re: Ray or Rod DT55 1989 Carb Float Adjustment

If the floats are too high when the bowl is upside down, they will shut off fuel too soon and possibly create a lean condition.

 

[summers1996]

Re: Ray or Rod DT55 1989 Carb Float Adjustment

One last thing here, then I think I'll be ok. The needle valve has a spring loaded shaft sticking out of it. When adjusting the float level; should that shaft be depressed... or should the tab on the float just rest on the shaft?

 

[Ray Neudecker]

Re: Ray or Rod DT55 1989 Carb Float Adjustment

Let it rest on it.

 

[summers1996]

Re: Ray or Rod DT55 1989 Carb Float Adjustment

Thanks ray, it looks like I did it right. I think I'm good to go.