yesterday i went to sand mountain utah and had a problem with my ds. it would only rev to 7000 rpms with a aftermarket white brothers cdi. i dont know if there is a problem with the cdi. should i get rid of it and buy a ron woods cdi? also i took it to a local shop a week ago and they took of the top part of the stock carb and i noticed i was not sealed right plus i noticed also there at a scematic of my carb online and its missing the o ring it looks like right under the diaphragm. do i need it? maybe the shop has no idea what there doing

thanks tim[img]i/expressions/face-icon-small-mad.gif[/img]

 

There could be a number of reasons why the bike isnt revving any higher than 7000rpm's.

If you still have the stock CDI, I would throw it on the bike and see what happens.

Yes, you need the rubber o-ring on the top of the stock carb.

Is your air filter clean?

Are you running the airbox?

Spark plugs firing?

 

im running the stock box with a k@n outwear plus a procircuit exhaust

 

Throw the stock cdi back on the bike and let us know.

 

stock cdi 7200 rpm
white brothers 7900 rpm thats running in neutral and holding the trottle wide open is there something the matter with my cdi or do you think the missing o ring is the problem or both

 

What is the rated rpm for the white brothers?

I think you need to replace the o-ring before you go out and buy another cdi. JMO.

 

i dont know my wife bought the bike new and had it installed when she picked it up i have no paper work for it

 

If Im not mistaken, I thought the stock cdi box was good for 7500rpms.

Im sure the White Brother's box would be atleast that.

I think you might have a carb problem.

Is the bike taking the throttle well from idle to the rev limiter?

 

its got a little hessitation and has a hard time starting but the bike has been to 2 shops for jetting its been running without that o ring for a while at least a year

 

Hmm, I suppose the shops checked the valves?

Did they do a compression check on this bike as well?