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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> q4 exhaust jetting
Post Info TOPIC: q4 exhaust jetting
nwrider


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q4 exhaust jetting
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i am thinkin about ordering the qr exhaust, at the same time should i order new jets, and which ones should i get, is anyone else running this exhaust



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truslack


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I think that is the exhaust I have on, it depends on your standard jets though - UK Jets are different to USA jets (for some weird reason).

If you have a 137 main jet as standard, and 50 pilot jet - I'd go with 52.5 pilot and 140 main.

UK bikes seem to have 145 main jets and 50 pilot jet, I'm just trying to work out which is better for UK bikes - 147.5 or 150 main. (FMF Exhaust and trimmed snorkel)

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truslack


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http://www.thumpertalk.com/topic/282432-ttr-250-modslinkspics/ 

That is an interesting lead, and what I based my original jetting on before I found out the difference between the countries.



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Current: Suzuki RG 125 Gamma, Armstrong MT500, MZ ETZ300, Triumph Tiger 885i, Kawasaki GTR1000, Kawasaki GPZ750, CZ175 Trial, Yamaha TTR250 Raid
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nwrider


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thanks i will order at the same time



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