OzVMX Forum

Marque Remarks => Husqvarna => Topic started by: hoppy on June 23, 2014, 09:41:58 pm

Title: CR250 1982 Mikuni Carb
Post by: hoppy on June 23, 2014, 09:41:58 pm

Hey am chasing a handbook or manual for the Mikuni carb in my cr250.

Rob

Title: Re: CR250 1982 Mikuni Carb
Post by: 80-85 husky on June 23, 2014, 10:14:34 pm

get onto Husqvarnaparts.com, phil has all the parts manuals you can download for free... look at the menu on the LHS

Title: Re: CR250 1982 Mikuni Carb
Post by: hoppy on June 23, 2014, 10:17:46 pm

Quote from: 80-85 husky on June 23, 2014, 10:14:34 pm

get onto Husqvarnaparts.com, phil has all the parts manuals you can download for free... look at the menu on the LHS

Thankyou..

Title: Re: CR250 1982 Mikuni Carb
Post by: bigk on June 24, 2014, 09:40:12 am

This is straight from the Husqvarna 1982 racing handbook for 1982 CR250, (handy little thing it is too).
Type: Mikuni
Vebturi: 38
Main jet: 410
Needle jet: R-4
Idling jet: 45
Needle position: #4
Air jet: 2.0
Throttle: 2.0
Needle: 6DH20
Air screw opening: 1.5 from bottom position
Cheers,
K

Title: Re: CR250 1982 Mikuni Carb
Post by: hoppy on August 08, 2014, 04:34:16 pm

I have had a good ride on the bike a couple of times now and it just seems off a bit in the low mid range.
The top end seems ok to me.
This is whats in the carb at the moment.
Idle jet 45
Needle 6f16
Needle jet says .166 then a symbol p6 and the 6 has been overwritten with an 8
Main jet 440

Is that lots different from the factory recommendations?
I am just learning this stuff..

Rob

Title: Re: CR250 1982 Mikuni Carb
Post by: hoppy on August 08, 2014, 04:59:56 pm

Also carnt see the recommended 6DH20 in my mikuni tuning manual.
Can you still get them or something to replace them?

Rob

Title: Re: CR250 1982 Mikuni Carb
Post by: huskibul on August 08, 2014, 05:03:53 pm

      Often a slide with a bigger cutaway can clean the huskies up in the transition from low to midrange :)

Title: Re: CR250 1982 Mikuni Carb
Post by: bigk on August 09, 2014, 12:23:54 pm

Try a 2.5 slide (if it has the 2.0 in it). I have one you can try. I just used a 6DH22 (I found it amongst my Mikuni stuff), not listed in any of the charts I have either. A bit longer & slightly leaner than a 6DH3.
K

Title: Re: CR250 1982 Mikuni Carb
Post by: hoppy on August 09, 2014, 05:16:46 pm

Yes has a 2.0 slide in it will give a 2.5 slide a try, thanks.

Title: Re: CR250 1982 Mikuni Carb
Post by: hoppy on October 08, 2014, 08:57:57 pm

Finally had a chance to get the bike to the track today.
Ended up jetting it to the factory handbook recommendations as per Big K's post.
Fitted the 2.5 slide as well.
Bike is heaps better certainly not perfect but happy with the results.

Rob