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Bob KellyIII · March 16th, 2024, 08:36 PM

Wow those were really big jets in there then..... man I'm surprised it ran at all !
140 stock to 170 WOW ..... that is really unbelievable !
at most from 140 maybe as high as 150.... with engine work as high as 160 but 170?
it's like Blink, Blink UH ?
I bet you were surprised to see them in there....... never a dull moment eh ? LOL
....
when I was porting and polishing 2 strokes, I would usually have to go 2 sizes up to get a chocolate burn but that is 2 strokes !
so that's like 150 to 155 to 160 because the way they numbered the jets on 250cc bikes back then.... now days you can get single digit increments.... the old mikuni carbs back then jets were real hard to come by.... I had to on many occasion drill them out by hand with indexed drill bits.... twas easy though...ya find the drill bit that fit it perfectly and just drill it out with the next size bigger
.... but you had to be sure to file off the numbers for the next guy or he would have a hard time figuring out why it was running strange ! LOL

Bob....

March 16th, 2024, 08:36 PM	#360
Bob KellyIII Retired motorcycle Mc. Name: Robert Location: Weed, California. Join Date: Jul 2021 Motorcycle(s): 2012 Kawasaki Ninja 250R, 2021 CSC TT250, 1977 Triumph Bonneville 750cc,2001 Honda XR650L. Posts: A lot.	Wow those were really big jets in there then..... man I'm surprised it ran at all ! 140 stock to 170 WOW ..... that is really unbelievable ! at most from 140 maybe as high as 150.... with engine work as high as 160 but 170? it's like Blink, Blink UH ? I bet you were surprised to see them in there....... never a dull moment eh ? LOL .... when I was porting and polishing 2 strokes, I would usually have to go 2 sizes up to get a chocolate burn but that is 2 strokes ! so that's like 150 to 155 to 160 because the way they numbered the jets on 250cc bikes back then.... now days you can get single digit increments.... the old mikuni carbs back then jets were real hard to come by.... I had to on many occasion drill them out by hand with indexed drill bits.... twas easy though...ya find the drill bit that fit it perfectly and just drill it out with the next size bigger .... but you had to be sure to file off the numbers for the next guy or he would have a hard time figuring out why it was running strange ! LOL Bob.... __________________________________________________ Its too late when you've gone too far !