Originally Posted by VPProUSA

I'm using a Mugen 2042 pipe with a 7mm reducer on my Arrow GTR-21 and getting 9:30 but the engine is still very tight. I expect to get 11-12 once it is fully broken in. I've never teched my Agama tank but I'm told it is undersize (about 121cc), so next week at the Nats I'll add a filter and fuel line and see what it can get.