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 baja burley
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| posted on August 6th, 2009 at 11:01 AM |
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yer cheers mick im thinkin i'll go down that path some time soon. probly concentrate on the body for the moment but.. do you remember what size jets
are in them now??
also do you still have the number of the guy who finally did it properly for you?
cheers
luke
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1916baja
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| posted on August 6th, 2009 at 05:41 PM |
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Well it was Andrew Westwood (oztowdster) who finally got them right but even then he reccomended we get it on the dyno. I don't remember what jets
are in them now sorry. there is a book with general jet sizes that will get it close. maybe google it??
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baja burley
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| posted on August 9th, 2009 at 07:31 PM |
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Cheers for the name. I'll try n reward you with photos. haha.
i got the new exhaust on today and although it sounds mean as!! still backfiring...
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aintgotitmusthaveit
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| posted on August 10th, 2009 at 01:06 PM |
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Baja Burley.
Backfiring though the exhaust is usually a sign of post detonation as a result of sucking air into the barrel with the exhaust valve open and having
unburnt fuel in the chamber.
Yes it will back fire with less backpressure as is achieved by having the muffler off ( as you foundout!) or from another leak somewhere in the
exhaust system (cheakjoins at heater boxes or J tubes etc)
Other than that Back to timing again and jets on the carb.
Is it backfiring when you press the accellerator (lean back fire up through teh inlet manifold ) or on backing off ( rich backfire). Note if youhave
an exhaust leak, with the engine running from cold block teh muffler with your hand and see if you can hear hissing somewhere else. The engine should
stall if it aint breathing out. If it doesn't odds are you have a leak somewhere.
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1916baja
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| posted on August 10th, 2009 at 04:44 PM |
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The carbies he has are my old ones and they are jetted to suit 1916 and they have an airleak on the butterfly shaft on 1 side, Once repaird and jetted
they should be fine. 
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baja burley
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| posted on August 10th, 2009 at 08:32 PM |
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Well im absolutely sure im getting TOO much fuel so it sounds like a rich backfire.
also not sure if its a problem but it doesnt seem to come back down to idle very quickly??
and when its sitting at idle it will randomly rev up a few rpm (dont have a tacho but its very noticeable, maybe 1000?)
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baja burley
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| posted on August 10th, 2009 at 08:36 PM |
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P.S. it backfires out the carbies aswell! very impressive at night
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1916baja
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| posted on August 11th, 2009 at 08:08 PM |
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The high reving is caused by the airleak. Spray a bit of wd40 on the left hand carbie linkage and the idle will come down. Also i used to have a
spring from the centre linkage on the hex bar to my engine cage to get better return on the gas. 
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