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  #1  
Old 09-07-2009, 08:20 PM
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Default Aussie WR450 jetting.

So over a few years im still not happy with my jetting and me being stubborn, i wont take it to an expert.
Im curious what you other guys are running?

Heres my details
Sea level to 100km (approx)
2006 WR450f
Fmf factory 4.1 slipon with Rev tube
Vortex x10 cdi
Twin air filter cage + filter
Opened airbox

Carbs specs:
ACV Intact
Adjusted TPS to max of range
48 pilot (im starting to think this is too rich)
168 main jet
JD jet kit Red needle #4
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  #2  
Old 09-07-2009, 08:33 PM
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SM93 is consistently running mid-fieldSM93 is consistently running mid-fieldSM93 is consistently running mid-field
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your pride is fucking with u, take it to an expert
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Old 09-07-2009, 09:19 PM
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What is/isn't it doing?
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Old 10-07-2009, 12:15 AM
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Well its leaving soot in the exhaust tip. however its arguable that the AirCutValve is doing this on deceleration.
and its backfiring OR popping on decel. again could be the ACV
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Old 10-07-2009, 08:04 AM
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Not necessarily signs of bad jetting though ... have you diagnosed the jetting? Started with the pilot, found your highest idle / best response off a closed throttle and adjusted pilot size as necessary? If you get your pilot right you can probably work through the main sizes and needle/position to arrive where you need to.
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Old 10-07-2009, 08:17 AM
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Sell it and buy a F.I. bike.
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Old 10-07-2009, 10:01 AM
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Quote:
Originally Posted by Wobbly View Post
Not necessarily signs of bad jetting though ... have you diagnosed the jetting? Started with the pilot, found your highest idle / best response off a closed throttle and adjusted pilot size as necessary? If you get your pilot right you can probably work through the main sizes and needle/position to arrive where you need to.
yeh done all that while curing my tps stutter
the bike has no flat spots etc
its the soot that worries me
and after going over to thumpertalk and reading that eddie sisneros, the jetting god, reckons soot is a rich condition.
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Old 10-07-2009, 03:51 PM
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Yep, generally a bit rich, but if it doesn't affect power delivery or running then.....

My DRZ ran a bit rich but still pulled well and ran fine, so just left it like that as the rich mixture also helped keep it a little cooler. Only really an issue if you deal with a lot of elevation change.

If you want to find out for sure, get on a dyno with an o2 meter and do some runs at 1/4, 1/2, 3/4 and full throttle...
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