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Post Info TOPIC: Open enduro carby jetting


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Open enduro carby jetting
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Hey guys.

 

I am taking the snorkel off my bike as I don't do deep water runs. I have also a barret aftermarket exhaust coming, so would a 52.5 pilot and 140 small round main be sweet for an uncorked and derestricted TTR??

 

I got this off a thumpertalk sticky, which is a sticky off the ttr250.com page. It sounded like an American bike, which has the same carby as the open enduro's I think. 

 

Can any guru let me know if this will be cool. Can't wait to jump on a uncorked TTR.

 

Thanks in advance guys. Can't wait to show you guys pics it is going to be a beast of a TTR



-- Edited by threshold on Monday 26th of June 2017 02:56:51 AM

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50 pilot and 147 main standard in Aus as far as i know. Some say the main is too big and runs too rich and that it doesn't need to be any bigger?

I put in a 52 pilot jet and left the main as a 147 and dropped the clip one notch down the needle instead of increasing the main jet size. Works well for me, no hesitation from idle no matter how hard you twist the throttle, seems to go well. Idle screw about 2 turns out.

What you have chosen is probably fine, the main Jet may be smaller that what you already have though, if its an AUS bike its likely to be 147. I think 137 were put in for US bikes. That's a big difference hey.

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Thanks Leigh!

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Looking forward to seeing the resultssmile

I was out testing the new exhausts I am having made and needed to put in some new jets as it was not running right, so I went for the stock 137 50 combo and all is really goodsmilesmile

No need to alter the clip



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Can't find any of the jets I apparently need! Should I just leave the snorkel in and have a go with new exhausts and stock jetting??

Bike is at mechanics. Very dissapointing to find out that I can't even get the jets for this japanese made bike.

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leigh wrote:

50 pilot and 147 main standard in Aus as far as i know. Some say the main is too big and runs too rich and that it doesn't need to be any bigger?

I put in a 52 pilot jet and left the main as a 147 and dropped the clip one notch down the needle instead of increasing the main jet size. Works well for me, no hesitation from idle no matter how hard you twist the throttle, seems to go well. Idle screw about 2 turns out.

What you have chosen is probably fine, the main Jet may be smaller that what you already have though, if its an AUS bike its likely to be 147. I think 137 were put in for US bikes. That's a big difference hey.


 

Do you have an aftermarket exhaust/removed snorkel on your bike mate?



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try brenton @ pitmans in adelaide.

i recon he can get the jets you need.
just make sure you let him know what year/model you have

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Yeah kman. From my under standing there is no jets left.

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Another good place for jets is www.mikunioz.com/

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I have plenty of jets in the shop here https://totallyttrs.com/epages/699105d9-e4cc-4b32-b236-84e72cd67f84.sf/en_GB/?ObjectID=1655063&ViewAction=FacetedSearchProducts&SearchString=carb

What you can't get any more is the v95 nozzle. It is my believe that you can run the v95GO from the blue bike in the OE, but need to raise the float height, as the V95GO is taller than the V95 nozzle.

I have not got to try this myself yet, but logically it should work.

Hope that helps

Steve



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Ok cheers for all your replies guys. Hopefully my mechanic can make sense of this, its all chinese to me. Cheers.

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Removed snorkel, top cut out of the airbox and restricter in the end of the header pipe cut out (not sure if the AUS OE models had one?)

 

Standard exhaust for now. 



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