RB-Designs carb mod or PowerNow?

[PEB]

The 07+ pipe is an SST type pipe supposedly similar to the Doma and OEM pipe. You are right the older FMF pipe had a huge hit and abrubtly signed off.

[2 strokes 4 life]

Originally Posted by PEB

The 07+ pipe is an SST type pipe supposedly similar to the Doma and OEM pipe. You are right the older FMF pipe had a huge hit and abrubtly signed off.

That makes sence. I cant wait to try my DOMA out, should be much better in the open stuff.

[AZRickD]

My jetting is pretty good. I have jets to take me from sea-level in winter (southern latitudes) to at least 7,000 feet in Flagstaff.

What doesn't work so well is the airscrew. Not much difference no matter how much I spin it. The current set up has pretty nice, linear power delivery. I'd say the motor signs off a little earlier than I'd like it (on the rare occasion I do MX) -- on single-track it's not an issue.

[Eric K]

The later year models seem to rev out a bit higher. However, I don't have any tach data to verify.

The pipe is by far the biggest contributor to top end performance.

For reference, I have run the RB Designs carb, the stock carb with many different setups, including the Power Now and the SLP Power Pack which is similar to Power Now.

[gasIdaho]

The carb mod was money well spent for me. I ride mostly at 6000ft and above. Adjusting my air screw(for temp, elev, etc)now has a profound effect on performance whereas before turning it full in or out had no effect. The one thing that surprised me was the effect on the top end.....it screams! This is especially nice when out riding in the desert. Overall, I'm running much larger jets than I did prior to the RB mod. I'll go one size larger only on the main and I can run safely at 2000ft in the desert