38mm Mikuni jetting on XR600

[dougMember]

so guys what jetting are you running on your XR600 with a Mikuni TM38-85 flatslide and what mods do you have. Need to get mine running better

[Mick DMember]

When I had an XR630. I had the 38mm Mikuni and was running a 210 main and a 12.5 pilot from memory.(I am at sea level)
If I ran a 200 main I found it would ping under load and at 220 you could near see pure fuel in the exhaust gases.
Needle setting in the middle,I didn’t fool with that much but if I had, there probably would have been gains there too.
Cheers
Mick

[dougMember]

thanks micknmeld what mods did you have done besides the 630 kit

[Mick DMember]

madougxr wrote:

Quote:

thanks micknmeld what mods did you have done besides the 630 kit

Mine was a 1999 model and came brand new with the HRC 630 kit. I just fitted 14/48 gearing.Cr500 read guard and LED tail light. AS far as mods went,I didn’t do that many.The carby, a set of fat bars and risers. Pivot Pegz and that was about it. Because it was a XR I didn’t have to do much except change the oil and ride it.
I also had a full staintune system on it for a while.

[dougMember]

no air box mods or after market air cleaner

[Mick DMember]

Not really just removed the snorkle thingy and put in a twin air filter

[GregMember]

micknmeld wrote:

Quote:

Not really just removed the snorkle thingy

I love it when you talk technical :laugh: :laugh: :laugh:

TB

[DeanMember]

You forgot to mention the fantastic stainless steel oil filter and pespex headlight gaurd

ollie

[Mick DMember]

Ollie wrote:

Quote:

You forgot to mention the fantastic stainless steel oil filter and pespex headlight gaurd

ollie

Oh yeah and also the Old Bull Guard stickers that made it go like a scalded cat. :laugh:

[dougMember]

Thanks micknmeld need to get me one of those Old Bull Guard stickers how much more Hp did it give you??? :laugh:

[Mick DMember]

Bucket loads of power mate!! Well worth the $20 for the stickers. :laugh:
One of the first rides with them on I managed to flip it and ended up with my foot in plaster (with a probable fracture).

I would only recommend the Old Bull sticker upgrade if you think you can handle the extra HP. :dry:

Another thing we found that will give you extra HP on a XR600 is to fit a set of spokey dokes to your front wheel. Moose’s XR rips with them on.

[dougMember]

mite have to raid the kids bikes to get some of them 😆

[dougMember]

well i just got some jet i ordered they were 230 and 250 main so i put the 230 in to start well after some playing with idol and fuel screw is running tops reving clean and smooth no flat spot so it is of to take it for a test ride fingers crossed :unsure: it stays like that at WOT

[Mick DMember]

Has it got a hesitation/bog of idle if you crack the throttle on?

[dougMember]

it did have that is gone now

well i just got back from a arvo ride not happy :angry: good down low but if i start giving it lots of 1/2 to 3/4 it will bog and i have to back off an clutch in and free rev it to stop it. So I need some help here to fix it or it will be up for sale and back to ome carby it was ok thought the Mikuni would be better not that i can see yet :angry:

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