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Joe Minton, THANK YOU AGAIN!!!!! Your recommendations gave me 37.2 mpg and no loss of power. I’ll check back and give out my mpg numbers later. Feels like the speedo needle is attached to the throttle, give it a 1/4 twist and needle jumps up in unison with throttle. 17.5 pilot, 50 nozzle, nozzle squirts right off idle, 97 needle, middle clip was perfect.
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Runs like a Screaming Banshee!!! Following you Gas Mileage suggestion, all I can say is WOW. Earlier today, I installed a Mikuni HSR 42 on my 07 105″ 10.1:1 CR pistons, cammed Dyna. It’s hard to believe it can run this good, and get better fuel economy, to boot. My face (I think my wife heard a happy expletive or two)!Īnyway, thank you for this info. Responsive, and powerful, that immediately a grin formed on
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The acceleration from idle (Once tuned right) was so smooth,
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Today, and I could hardly believe what we were experiencing! Information on getting my old Evo (’97 Dyna FXDS-CONV) I must say, “Thank you very much”, for your generous To “Joe Minton Mikuni HSR42 setup/tuning recommendations” You can follow any responses to this entry through the On Sunday, May 6th, 2018 at 7:01 am and is filed under General.
#Mikuni tm24 2 stroke tuning install#
Either race the thing or install a more appropriate cam for street use. No Mikuni or any other carburetor can fix this. Big cams, those with intake-closing angles of close to 50 degrees ATDC, aren’t going to run well below 4,000 rpm. Nothing, not this kit, not this carburetor, nor any carburetor, is going to make an engine suffering with open straight pipes run well.ģ. The original 97 needle should fix this.Ģ. Engines with high cranking pressures (high compression) may detonate at low rpm when accelerating. Midrange throttle response is greatly improved and the engine is much more pleasant to use. Don’t be surprised if you record 48-to-49 mpg at 65 mph. Fuel mileage increases, sometimes dramatically. The engine is more responsive, cleaner and “happier” sounding because of the leaner mixtures in the 10-to-25- percent throttle range, where we do most of our riding.ģ. This is because the idle jet is more correct and the pump delivers fuel sooner but at a lower rate than stock.Ģ. Performance just off-idle is cleaner and more immediate. Fit the leaner needle with the clip in the middle notch.ġ. Fit the smaller idle jet and adjust the mixture screw for best idle.ģ. Adjust the end point for maximum travel.Ģ. Adjust the accelerator starting point so that the pump starts working immediately.
#Mikuni tm24 2 stroke tuning manual#
The kits come with simple installation and tuning instructions.Īdjustments (See The Manual For Details):ġ. The kit is called the Mikuni Mileage Kit and there are separate kits for the HSR42 and 45 carburetors because the needles are different. These parts are available individually or in kit form from Fox Distributing in St.