Recent content by sunruh

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    Main jet sizing

    why not try moving the clip up (ie needle down) 1 notch. sometimes going richer is NOT the answer!
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    Main jet sizing

    why do you think you need to go up on size and not down? pilot jet -> needle jet clip -> main jet (simple 2stroke carb) --- yes there is more like slide cut away, needle size and taper(s) and on some carbs (4strk) a whole lot more if you very very slowly move the throttle more open does it...
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    2023 cbr1000rr

    clutch basket fingers is your aluminum issue
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    2022 HD Street Bob 114 Valvoline VR1

    even with the stoners inadaquate fuel dilution you can tell by the flash point...but somehow yours was short and wasnt done. your previous test with a 415 would be pretty low on fuel dilute m1 15w50 redcap did not hold up in my MixMaster of DOOM...in under 200mi it went to a susvis of 71.9...
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    2022 HD Street Bob 114 Valvoline VR1

    50wt is 83.11 or 16.3cst so yours is not close now, the real question should be: is that what is causing your high copper?
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    Change your brake fluid

    the little race cars you work on go 300mph and even with a parachute(s) need all the braking power they can get
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    Change your brake fluid

    when i was racing a full season...i was changing the brake fluid after every race. i also use a mighty vac and ive used motul 5.1 for 20 years now
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    09 yz450f reusable oil filter?

    ive used a stainless reusable one for .... what decade is this ... oh yeah ... 22 years i just use carb cleaner on it...put the air hose chuck on the inside....blowing the air and wrapping it in a paper towel...done in 2mins ive gotten all 3 of mine from scotts (the steering damper guy) but...
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    4 stroke titanium valves with copper beryllium seats

    yes ive seen the cam gear spin on the camshaft...nasty problems occur it doesnt happen often...but all it takes is once here is my advice on the cam chain adjuster...get a reading on the tension with the honda unit installed...then you know how much to do the aftermarket manual version my 06...
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    4 stroke titanium valves with copper beryllium seats

    thats one of the biggest "it depends" there is. right now in my heat and dust...50 feet...maybe 100. if you R&R filters every moto thats about as good as it gets down here in a 2hr harescramble the pros will actually pit and change filters as it gets too plugged also remember that going to SS...
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    4 stroke titanium valves with copper beryllium seats

    looks very very nice!!! i hope it lasts till christmas like i said my buddy Perry had one...valve after valve after valve in that...and he took it to a primo shop to to make sure it was all aligned and straight. munch munch munch then he found it was cheaper to just by an entire head from HoT...
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    4 stroke titanium valves with copper beryllium seats

    oh i understand extreme heat...as i type this 105 heat index 111 .... not the hottest its been in the last week
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    4 stroke titanium valves with copper beryllium seats

    that era of crf250r motors is notorious for eating valves. i mean like tic tacs. nom nom nom. i had a racing buddy that went through 4 sets of valves and 2 heads in just 1 season and just hated the entire experience. loved how the bike rode...hated the amount of work he put into the head/valves...
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    2 stroke racing oil

    fouling a plug is entirely due to jetting and not oil ratio no idea if yamalube-r is still made or available, but used to be darn good. then i ran mobil1 Racing 2T when i raced my 98yz250 no idea if it can be found anymore, but there was a video of barium infused 2stroke oil put into a 2stroke...
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    2 stroke racing oil

    the more oil you run the better the ring seal and the more hp you make. for a 250 using 32:1 is ok, but on a 125 ringding id suggest 24:1 and yes i used to own a yz125h. as well as a yz80d that i ran 20:1 in
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