2000 Duc Monster 750 - Intermittent Problem - Help!

[DRKWNG]

Maybe you could introduce yourself over in DesmoTropic and one of the locals can point you in the right direction for a tech.

YEA!  What gives?  You been riding around looking all flash and didn't even bother to come say hi.  WTF??!!

[tcspeedfreak]

+1 on the stuff plugging the fuel line, but what about vapor lock, he did say that the bike was sitting in higher traffic. air cooled bike, longer sits without much air flow, stuff starts to get hot.  i have the same idle issue with my 750 and trying to fix it has been like chasing goasts

[Javamoose]

The Kreeme will dissolve with MEK. I've removed it before and it takes about a gallon used in three steps to completely remove it.

It will hurt the paint if you're sloppy, but if you're careful you won't hurt the paint job.

I'm wondering if the tank was leaking from the hinge and someone Kreemed it. If you look underneath around the hinge does it look like it's been welded?

I'll check under the tank when I get out of work today and look at the hinge.

I emailed Cosmic Airbrush (they did the paint) to see if they remember the bike and if they did the Kreeme.  I figured I would ask them and maybe they would offer to strip the tank for me (fingers crossed).  Otherwise, I'll drain it and do the MEK myself.  After stripping it, do I need to re-coat it?

YEA!  What gives?  You been riding around looking all flash and didn't even bother to come say hi.  WTF??!!

Ha!  I didn't even know you guys existed!  Someone on SBN pointed me over here.

+1 on the stuff plugging the fuel line, but what about vapor lock, he did say that the bike was sitting in higher traffic. air cooled bike, longer sits without much air flow, stuff starts to get hot.  i have the same idle issue with my 750 and trying to fix it has been like chasing gosts

Regarding the vapor lock issue, is that common?  Someone on SBN brought that up too, since it only happens when the bike gets really hot (like, even the frame is burning hot to the touch, not sure if that is normal).  How would one fix that issue, besides not getting stuck in traffic!

I was thinking of doing and oil change/flush and refilling with Royal Purple Max Cycle, since they say it helps air cooled bikes run cooler, not sure if that's true.  Anyone run the RP Max Cycle?  I'm running Mobile full synthetic motorcycle oil now...

[Howie]

You won't get a notable cooling difference changing from one quality brand syntheic tothe other.  If you are running extremely lean that will lead to high temperatures and vapor lock, you need to fix those issues first. 

[ducpainter]

I'll check under the tank when I get out of work today and look at the hinge.

I emailed Cosmic Airbrush (they did the paint) to see if they remember the bike and if they did the Kreeme.  I figured I would ask them and maybe they would offer to strip the tank for me (fingers crossed).  Otherwise, I'll drain it and do the MEK myself.  After stripping it, do I need to re-coat it?

<snip>

Yes...

preferably with POR-15...and have the hinge brazed if it hasn't been already.

It can be done without ruining the visible paint.

[tcspeedfreak]

Regarding the vapor lock issue, is that common?  Someone on SBN brought that up too, since it only happens when the bike gets really hot (like, even the frame is burning hot to the touch, not sure if that is normal).  How would one fix that issue, besides not getting stuck in traffic!

im really not overly sure on motorcycles but in the marine world its typicaly a restriction, air leak, fuel pump on the way out all of which would cause the machine to run lean and then in turn get excessivly hot

[Javamoose]

So, this problem came back in full force last Sunday.  While on a ride with the group, bike did the stutter/stall thing.  We stopped for lunch and after letting it cool down for an hour, it fired back up and was running fine.  About 3-4 miles down the road, with an even throttle, the bike was dropping off then kicking back on until it finally stalled under power.  Could not get it going again.  Had a weird *hot* chemical smell as well.

Pulled the plugs, it's running lean...plugs are ash-white in color with a black glossy looking varnish all over the threads and plug seat.  Trailered the bike back to my shop where it is sitting now.  I'm draining the tank and ordering the POR15 kit, replacing the fuel lines and fuel filter.  Also going to do the timing belts, since it's at 17k miles and it's never been done.  Figured I might as well do a full oil change as well.

Oh, about the oil...I've been going through a quart a month!  It's not burning oil (no smoke) and there are no leaks that I can find (also, never been any drops of oil under the bike where I park it).  So, where the hell is all the oil going???

I'm thinking about dropping the coin on (all from CA Cycleworks) a new fuel pump, Dynacoil kit and a FCR 39 Carb Kit.  But, the oil thing has me worried...