Author Topic: yz 465 jetting please  (Read 1695 times)

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lms6201

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yz 465 jetting please
« on: November 08, 2008, 03:25:51 pm »
it,s set to the book but doesn,t seem right , any advice please

Offline TonyB

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Re: yz 465 jetting please
« Reply #1 on: November 11, 2008, 09:34:40 am »
IMS -- 6DH4 needle -clip in top slot 3.5mm slide cutaway 35 pilot 360 main  with retro rocket pipe (yz490 pipe) V Force reeds = crisp clean big smooth power and still on one plug 1 year later including slow trail riding and tight sections...   The slide cutaway is important and 3.5mm is'nt 3.5mm measured from table to top of cut.
« Last Edit: November 11, 2008, 09:36:32 am by TonyB »
'Life's Journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways,totally worn out, shouting,  ' Holy sh!t... What a Ride!! ' '

lms6201

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Re: yz 465 jetting please
« Reply #2 on: November 12, 2008, 06:37:55 am »
thanks tony , i have a spare #4 slide ,too much do u think ? or better to file down a 2.5   

Offline TonyB

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Re: yz 465 jetting please
« Reply #3 on: November 12, 2008, 12:26:28 pm »
Steve, not sure what a #4 slide is, is that 4mm cutaway? if so you could try it and maybe up the pilot to 40 or 45 and screw the air screw in a bit. The more the cutaway the more tendancy to run a little pingy lean on small throttle openings with high revs like when you are just feathering the throttle. The setup i have is just on the rich side of a ping at very small throttle openings but the main advantage is the huge improvement in throttle response, if the throttle is blipped she has an instant rev. With the old 2mm or 2,5mm slides the revs tend to build slower. The V force reeds are a must too, they are great. The powerband i have now is nice and smooth. Oh i also run BP race fuel 100 leaded.
'Life's Journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways,totally worn out, shouting,  ' Holy sh!t... What a Ride!! ' '