My Top Speed Is...

mtiberio · 06-16-2020, 07:51 AM

About 65 (phone GPS) or 72 indicated. I have a 2020 TT250, and I have a 42 rear sprocket. I have rejetted. Funny I decided to rejet again on my 2nd oil change. I lost like 10 MPH up top. I backed out just about everything I had done (went from 112 to 117 main, needle from #3 to #4 and from 2 to 2.5 on the IMS, and then went back). One thing I should have realized would have cost me tons was a switch from 10w30 to 20w50. I changed that back out too. Now the bike is back to what I mentioned in my first sentence. Oh yea, the miss I had at WFO, got rid of that by replacing the "torch" plug with a proper NGK.

06-16-2020, 07:51 AM	#11
mtiberio Join Date: Jun 2016 Location: Arlington, VA Posts: 258	About 65 (phone GPS) or 72 indicated. I have a 2020 TT250, and I have a 42 rear sprocket. I have rejetted. Funny I decided to rejet again on my 2nd oil change. I lost like 10 MPH up top. I backed out just about everything I had done (went from 112 to 117 main, needle from #3 to #4 and from 2 to 2.5 on the IMS, and then went back). One thing I should have realized would have cost me tons was a switch from 10w30 to 20w50. I changed that back out too. Now the bike is back to what I mentioned in my first sentence. Oh yea, the miss I had at WFO, got rid of that by replacing the "torch" plug with a proper NGK. __________________ 4 time WERA SuperVintage Roadracing National Champion, SCTA Land Speed Record Holder, 3rd AMA Motorcycle GP of Miami
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