Re-jetting carb

sportfire1961 · Post by **sportfire1961** » Sat Nov 05, 2005 8:05 am

I have a sportfire sled that has no airbox, A pod filter from DK has been reccomended, to do this can anyone tell me what i should re-jet the Mikuni carb to or if it needs to be changed at all? Thanks, Mike

PENT-H2O SLEDDER · Post by **PENT-H2O SLEDDER** » Sun Nov 06, 2005 4:25 pm

I used a UNI filter on my 79 Trailfire with no problems and never had to re-jet. The problem would be if you were trying that with the Power-Jet cards from the Liquifires as they do need a certain amount of vacuum to operate properly. If you do use a foam filter (like UNI) dont oil the foam, it's not needed for dust control and will just cause the filter to pick up all the belt dust and other underhood junk.

sportfire1961 · Post by **sportfire1961** » Sun Nov 06, 2005 9:58 pm

Thanks for the info, that was what I was hoping to hear. I'll be calling D K soon.
Thanks again, Mike

Deleted User · Post by **Deleted User** » Mon Nov 28, 2005 5:30 pm

What size jetting are you running in your sled H2O?

swedefire · Post by **swedefire** » Mon Nov 28, 2005 6:57 pm

The sportfire also has the Powerjet carb....

Go up to 220 on the main jet, read the plugs and work from what you get with that setup...better safe than sorry...

/Magnus

harleysportster · Post by **harleysportster** » Mon Nov 28, 2005 8:48 pm

sportfire1961,
If your sportfire has the power jet carb on it, you will need to track down and install the correct airbox. Without the airbox, the power jet carb will not function properly.

That Girl Racing · Post by **That Girl Racing** » Mon Nov 28, 2005 9:21 pm

Harley is right , get the airbox. Keep in mind when running a PJ carb with a K&N filter that it is the PJ that needs the vacuum to work. It is the jet that must be richened up. Going up on the main does not solve the lean midrange problem. Peter

ProJd69 · Post by **ProJd69** » Thu Dec 01, 2005 3:22 am

SPORTFIRE1961 I have an extra air box from an 80 sport and will sell it if your still interested. I also have othere parts from it to No motor though I'm going to hang onto that for my newer one I just picked up just in case.
e-mail me at prousmc@yahoo.com