i am pretty sure its the carb now...we put my carb on rotaxds's bike and his did the same thing..wouldnt idle for anything!!!what could it be!?ive cleaned out the whole carb..cant seem to find out what it is though...i can still ride it right now its just hard to keep it running...i think i will be staying w/stock cams for now...i have ported intake,ported head,3 angle valve job,11.5:1 comp piston,tm45 on alky....now all i need is a slip on exhaust..anyone got one they might wanna sell me [img]i/expressions/face-icon-small-smile.gif[/img]???

 

in other words...if my rpms go below about 2500-3000 it will just die...and it did the same exact thing on rotaxds's ds...what do you think it could be!?

 

might be way overfueling on the low RPM's and drowning the plugs so they won't fire. Does it start up fine or does it have to be pull started? When it dies you could pull a plug and see if its wet or not. Mine was doing that when it wasn't getting enough alky when it was idling, kind of wierd I thought.[img]i/expressions/face-icon-small-smile.gif[/img]

 

Fix the probem... Get a lectron [img]i/expressions/face-icon-small-smile.gif[/img]

 

[img]i/expressions/face-icon-small-happy.gif[/img]

 

well..it cranks up fine.. i dont have to pull start it anymore once the piston seated..

 

After thinking about it more my wifes garden tractor has a 44 mm Boswell Mikuni alky carb on it and this summer after cleaning the carb it would not idle at anything under 300 rpm. I took the needle out of the Mikuni out of my dads Cub Cadet ,which is also set up for alky, and put in the Boswell carb and it ran fine but then my dads wouldn't idle. Reluctantly gave my dad his back and got a new one for my wifes Cub and it ran fine. Threw the old needle away. I have no idea why they would not run on that needle because it always had before but it wouldn't and that is how the voices began.[img]i/expressions/face-icon-small-wink.gif[/img]

 

so you think its the needle?

 

Just a guess. I would have never of thought it would do that but it did on one of our 44mm mikuni's. Doesn't take much to try a different one. Sounds like you did everything else so not much left[img]i/expressions/face-icon-small-smile.gif[/img] On the first needle I had moved it to every notch and still did it. The other needle you could tell the differences in the needle height by the way it would rap . When I held the two needles together they appered to be the same couldn't tell any differences at all. Weird hence the voices. LOL[img]i/expressions/face-icon-small-happy.gif[/img]
Almost forgot don't know if you got a slip on yet but there is a FMF power core 4 with a spark arrestor on ebay that ends pretty soon for $70. I have one of these on my gas DS and I think it runs better than it did with the white bros R4, and it is a LOT quieter. I don't think its loud at all has a nice low/deep tone. and its a LOT lighter than the other slip on. Everyone that has rode it thinks it has more power all the way through the powerband. Just a thought.[img]i/expressions/face-icon-small-smile.gif[/img]