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XR 600 Carb Question

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cebo
Clanton, AL

cebo has no Avatar

USA
1 Posts

Topic started on 08/10/2012 at 9:50:00 PM

I got an 87 xr 600 this week for next to nothing. When you get it cranked it runs great, but needs a high idle to keep from going dead and will not hardly crank hot. I've owned (including a Zundapp as my first dirt bike) or been around about everything but an open class honda. Current bike is a 76 TT500 that is hell in the woods and would really like to get this bike set up as a reliable ride. It has a supertrapp and is otherwise stock. Jets are stock 122. The guy I got it from supposedly went through the carbs and I think it has been sitting up a while. Primary carb is leaking a bit and a correct float adjustment hasn't helped. I have needle/seat kits ordered and plan to soak them. I have heard these dual carb models have a reputation for hard starting and know a guy that converted his 350 to a single carb that made it much easier to start. New plug does not show it loading up and looks fine, maybe just a little lean.

My question is can the dual carbs be set up for fairly easy starting /reliability and any recommendations for the jets or is conversion to a single carb a feasible setup. I'm new to the site and could not find any old posts specifically addressing this so any help would be appreciated.

87 XR600R

Daved144
Watsonville, CA

Daved144 has no Avatar

USA
22 Posts

Posted on 08/11/2012 at 08:32:01 AM

I have a 1987 XL600R and it can be a pain to start if the bike has been sitting for over a week since the last ride. If I ride it often, daily, it usually starts in a couple of kicks. The bike is mostly stock with the exception of a supertrapp exaust and richer jetting. And the choke cable/lever isn't on the bike, so I start it cold with no help with usual choke/cold start. I used to have a Yamaha XT600, also dual carb., and that bike always started in a kick or two cold or hot. I think you should ride the bike a while before changing the carb. set up and all. The bike starting may get better after a couple tanks of gas . Maybe add a fuel injector/carb. cleaner to the fuel with the next fill up.

87 XL600R

cebocraig
Clanton, AL

cebocraig has no Avatar

USA
1 Posts

Posted on 09/05/2012 at 10:34:02 PM

I ended up boiling the carbs out and bumping the mains from 122 to 125 and slow jet from 45 to 48. Then replaced the stock stator with a ricky stator. Runs great and cranks almost always on the 1st or 2nd kick. I think the main culprit on the hard starting was the stator.

XR600R

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