Another race gas thread

nwmx
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Corona, CA US
nwmx
I’ve been running the vp u4.4 with a 14:3:1 piston and vortex ignition on a 250f. The bike pops a lot on decel.. I’m thinking it’s cause 4.4 is so oxygenated. Still does it after richening the fuel trim on the vortex.

Does anyone mix mr pro 6 with the lower budget t4? I want to be safe from detonation. Or has has good luck with another vp with that high of a compression piston?

What about renegade?
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hillbilly
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hillbilly 2/29/2020 8:52am
2/29/2020 8:52am
Airleak around headpipe to head flange
5
nwmx
Profile picture for user nwmx
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Corona, CA US
nwmx 2/29/2020 8:55am
2/29/2020 8:55am
hillbilly wrote:
Airleak around headpipe to head flange
I have the yoshimura dual system.. already sent the headers back to yoshimura to be shimmed. I hate yoshi’s design on the new Honda 250f’s
Beaudzz118 2/29/2020 7:26pm
2/29/2020 7:26pm
Try adjusting tps up 50-80 ohms?
racerx217
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racerx217 2/29/2020 7:37pm
2/29/2020 7:37pm
sounds like an air leak for sure

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