Questions

deacon · #1 07-29-2008, 05:47 AM

We need a place to ask each other questions. Since our engines are not the china bike engines we need help from others using alternate engines.

Let me start. I had to swap out the carb on a chainsaw I'm using. I put on the carb from a 31cc ryobi weedeater. It starts and it reves to a point then bogs down at the top end. Which needle needs adjusting. They are color coded so if you know the color it would be a big help ...

I know one is high end and one low I just dont know which is which.

Im going to be stripping down and remounting the engine this morning so if you know please answer so I check back before i start trying to run it again.

thanks deacon

Bikeguy Joe · #2 07-29-2008, 06:49 AM

deacon, see if this helps.
Walbro Carb Tune up!

handy_Biker · #3 07-29-2008, 09:18 AM

If its a walbro, the screw nearest the engine is the Idle/low speed, the one farthest from the engine is the HighSpeed. I have read several different scenerios on them, and after having to tune the three different ones I've been dealin with.. the idle and low speed DO have some effect on high speed ( smooth transition from low to high). When the engine seems to 'stumble' when accelerating, or hard to start, its usually needs to be tuned richer ( turn screw in. The differences of running good and running at all is sometimes as small as one screwdriver blade width.

Hope thats of some help

handy_Biker · #4 07-29-2008, 10:14 AM

Deacon, about your 31cc front mount... are you able to drag / compression start it or do you have to use the rope start ??

muddawg · #5 07-29-2008, 11:24 AM

theres almost always a little "L" and "H" on theese carbs

clean it up and youll see them
those plastic things ,theyre just there to keep you from adjusting yer carb very much

thanks to the epa

and yep you need to adjust the high speed first

good luck
mike

deacon · #6 07-29-2008, 03:39 PM

I think i got it by accident. I wont know till tomorrow.

no I never can get the 31cc to drag start anywhere. I think it is just too much compression for it to move fast enough. If I get enough tension to turn it over constantly the bike is too hard for me to pedal.

It runs much much better with just a little tension. I use a spring for tension and they vary in strength. The one on the 31cc front mount is more than a screen door spring but you can pull is some by hand. I have some so tight it is almost impossible to pull them at all.

I just change them till i find the one that works the best.

deacon · #7 07-31-2008, 05:32 PM

Since nobody else has a question I'll ask another one.

As most of you know I have a bunch of old bike parts from bikes I junked out. I have a couple of old brake sets laying about so today I stuck one on the front of the chainsaw bike.

But when it clamps on the wheel it doesn't seem to have any effect. I figured the rubber on the brake pads had dried out. A few minutes ago I gave the pads a light sanding. I thought I would give that a try before I bought new pads.

Anyone ever try that?

**Ilikeabikea** · #8 07-31-2008, 05:46 PM

I've never tried that. I have in the past used a mixture of bleach and water to soften rubber. I had an old reel to reel that the rubber on the drive wheel got dried and stiff and I couldn't find another so I soaked it in bleach and water and it softened it up where it worked for a few more years....................

deacon · #9 07-31-2008, 05:49 PM

I was playing music on my reel to reel in the sixties when it started to drag. My cousin said use some alcohol to clean it. I said I don't think i have any. He walked into the kitchen and came back with a shot of vodka... It worked lol.

**Ilikeabikea** · #10 07-31-2008, 05:51 PM

Reel to reel, we must be old fogey's Deacon. I finally threw my old reel to reel in the dumpster about 2 years ago. That dang drive wheel.................................