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Author Topic: Where to buy small drill bits for Main jets?  (Read 6854 times)

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76supersport750F

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Where to buy small drill bits for Main jets?
« on: October 08, 2009, 09:14:07 AM »
Hello I have a couple of sets of Main jets.

Instead of buying new I would like to drill these out.

Do you know who has a small kit? I have tried Sears, Bike shop, Autozone.

You think the bike shop would help but all they can do for me is sell me more jets.

I don't know exactly the jet size I need and I don't want to keep buying 4 at $3.50 each and find out I need to go up or lower again.

Thanks
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Offline bryanj

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Re: Where to buy small drill bits for Main jets?
« Reply #1 on: October 08, 2009, 09:18:46 AM »
Any decent engineering supplier should carry drills in letter sizes
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Offline mystic_1

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Re: Where to buy small drill bits for Main jets?
« Reply #2 on: October 08, 2009, 09:19:06 AM »
Drill bits aren't the best thing to use to resize jets.

That said you can get precision miniature drill bits at Harbor Freight and probably your local hobby shop.  

Keihin jet size is the metric size of the hole with the decimal shifted, so 120 jet = 1.20mm hole, 125 jet = 1.25mm hole, etc.

mystic_1
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Offline 754

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Re: Where to buy small drill bits for Main jets?
« Reply #3 on: October 08, 2009, 09:39:07 AM »
If the 15.00 per set is killing ya, you wont like high performance biking.. They may be cheaper elsewhere.

Seriously, you are better off having an assortment, as once you are too rich, you will have to go smaller, & they dont have drills for that. ;). plus unmarked jets are a pain, moreso when you get mixed , unmarked jets.. :o

 Dont expect Sears to have ANYTHING performance oriented..

 If you have a 750 with a pipe and pods, I bet a set of 115,s and 120s is all you will need.
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Offline bistromath

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Re: Where to buy small drill bits for Main jets?
« Reply #4 on: October 08, 2009, 09:41:31 AM »
Don't use twist drills. Use straight-flute reamers. You can get them in letter sizes from McMaster-Carr.
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Offline TwoTired

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Re: Where to buy small drill bits for Main jets?
« Reply #5 on: October 08, 2009, 09:54:32 AM »
You can actually buy jet reamers, too.  If there is any interest in accuracy.
http://www.toolsource.com/jet-reamer-set-16-pc-p-77485.html?sourceid=googleps

Oh wait, that costs more than $15.
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Offline sangyo soichiro

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Re: Where to buy small drill bits for Main jets?
« Reply #6 on: October 08, 2009, 04:39:50 PM »
Some future owner of that bike is going to be beating his/her head against the wall if they ever try to rejet it again.  The numbers on the jet won't match the actual size if you ream them out.  Not sure that should change your mind.  Just sayin'....
 :D
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Offline mystic_1

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Re: Where to buy small drill bits for Main jets?
« Reply #7 on: October 08, 2009, 05:30:49 PM »
Anyone know where we can get little tiny number stamps?












;)  ;)  ;D

mystic_1
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Offline 75750SS

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Re: Where to buy small drill bits for Main jets?
« Reply #8 on: October 08, 2009, 05:46:39 PM »
Tower Hobbies or maybe a local hobby shop.
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXL466&P=ML

Did just that when I was screwing around with pods.  Went back to the air filter.
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Offline Derby City

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Re: Where to buy small drill bits for Main jets?
« Reply #9 on: October 08, 2009, 06:46:34 PM »
Good point.  You don't want to be a PO, do ya? ;D

Quote from: soichiro on October 08, 2009, 04:39:50 PM
Some future owner of that bike is going to be beating his/her head against the wall if they ever try to rejet it again.  The numbers on the jet won't match the actual size if you ream them out.  Not sure that should change your mind.  Just sayin'....
 :D

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Offline Jonesy

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Re: Where to buy small drill bits for Main jets?
« Reply #10 on: October 09, 2009, 05:07:06 AM »
Quote from: soichiro on October 08, 2009, 04:39:50 PM
Some future owner of that bike is going to be beating his/her head against the wall if they ever try to rejet it again.  The numbers on the jet won't match the actual size if you ream them out.  Not sure that should change your mind.  Just sayin'....
 :D


I've been the victim of that one.. it ain't fun..  :P :(
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