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  #16  
Old 14 Aug 2010
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Originally Posted by Osama Radzi View Post

2)Difficult to start. Especially when cold. Once started its easily starts the next day, but If left it for few days, Its difficult to start again.... does anyone has any clue???
I've had a XR600 for many years and suffered the same problem. Starts fine today or tomorrow but leave it for a week and it won't go. Some years ago on a winter trip to France it took me a complete morning to get it started, much to the annoyance of my companions who were ready to go.

The problem is fuel evaporation / degradation in the float chamber of the carb. After a few days the more volatile components evaporate and what's left won't vaporise enough to start the engine. (at least that's my theory).

The fix is more of a workaround - undo the float chamber drain screw and drain off about a float chamber's worth of fuel - about 40-50ml. If you do it with the fuel tap in the on position it'll flush out the old stuff and refill the chamber as soon as the drain screw is tightened up. It's worked for me every time. I've left the bike for months, flushed the fuel through and had first kick starting (no electric start on the XR)
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  #17  
Old 17 Aug 2010
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yeah dats my theory too...

I agree with you on that, a mechanic claimed dat RON95 petrol is not good enuff, other bikers who had that problem uses RON97 and solved thier problem.... but Ron97 is 30 or 35 cents more expensive!

But I also had that problem with new petrol but cold engine.????
what I would do is sprinkle some petrol in the air box and it tend to start easier, but its really a hassle.

dats not really a major problem right now coz I ride the bike everyday now, my latestt problem is jerking.
Idle is okay,
traffic jams riding also okay
but once I start to accelerate it tend to loose power, as if theres not enuff air in the air box, I noticed it will happened more frequent on rainy days, I reckon theres an electrical leakage sumwhere, maybe the plug coil wire or sumwhere, on other days it runs just fine (except for the ticking noise)

Im really frusrated

what to do to check wire leakage? Another mechanic suggest that I should check my earthing,
how do I check my earthing or earthlings.... :-)
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  #18  
Old 17 Aug 2010
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Quote:
Originally Posted by backofbeyond View Post
I've had a XR600 for many years and suffered the same problem. Starts fine today or tomorrow but leave it for a week and it won't go. Some years ago on a winter trip to France it took me a complete morning to get it started, much to the annoyance of my companions who were ready to go.

The problem is fuel evaporation / degradation in the float chamber of the carb. After a few days the more volatile components evaporate and what's left won't vaporise enough to start the engine. (at least that's my theory).

The fix is more of a workaround - undo the float chamber drain screw and drain off about a float chamber's worth of fuel - about 40-50ml. If you do it with the fuel tap in the on position it'll flush out the old stuff and refill the chamber as soon as the drain screw is tightened up. It's worked for me every time. I've left the bike for months, flushed the fuel through and had first kick starting (no electric start on the XR)
I had that exact problem on my DRZ after I fitted my Clark Tank/fuel filter.

Evaporation is normal but the fuel pressure should be enough to replenish. Fuel does not go bad in a few days and the volitiles don't evaporate off in that time either. (Well, iv never heard of that)

It turned out to be my fuel filter and pipework were not allowing sufficient flow to replace the evaporated fuel without engine "running" vacuum..

You would of found that a quirt of powerstart in the airbox will also get things moving as well as the carb drain trick.

Anyway, a permanent fix is to get a LARGER fuel filter (if you use one) and make sure you fuel line has no kinks or vertical lines of travel, even if you have to loop some fuel around in a figure 8 !!

Sorted it out for me !!!!!!!!!!! I was ready to install a fuel pump !
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  #19  
Old 19 Oct 2010
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travelled the americas on a dommie. dropped valve seats in canada and again in quito. lots of delays and costs as a result (but with great stories of fantastic people helping) why did it happen? after much thinking i reckon it could have been the big tank restricting air flow to the head. poss solution is to fit an oil cooler or someone who can post you a new head!!!
good luck with the trip, i liked my dommie and it rode well.
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