Mikuni VM28-418 - Page 2

SpudRider · 07-31-2014, 01:58 AM

Thanks for posting the update.

Weldangrind · 07-31-2014, 02:35 AM

Quote:

Originally Posted by zingshoen

it has a choke, visible in the top photo as a brassy handle between carbie body and cylinder just to the left of the slide idle adjuster. i fire her up with the choke, but take it out after a few seconds.

I see it now. Thanks for the details.

mmprestine · 07-31-2014, 12:35 PM

Thanks for all the good info. Never used one on a 4-stroke but have on the 2-smoker dirt bikes. They always ripped like hell. The round slides have always seemed to give me everything I needed on a 4-stroke but would be fun to learn some more. Might have to try one of these out to see what changes I can get to the low end performance. Wish I had a dyno, sigh!

Weldangrind · 07-31-2014, 11:28 PM

I've been thinking the same thing about flat slides.

A dyno would be nice, but virtually the same thing can be found in smart phones these days. As well, an increase in top speed is an increase in HP, whereas a decrease in trap speed in the 1/4 mile is an increase in torque. We can still quantify our improvements to a point.

07-31-2014, 01:58 AM	#16
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Thanks for posting the update. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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07-31-2014, 11:28 PM	#19
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I've been thinking the same thing about flat slides. A dyno would be nice, but virtually the same thing can be found in smart phones these days. As well, an increase in top speed is an increase in HP, whereas a decrease in trap speed in the 1/4 mile is an increase in torque. We can still quantify our improvements to a point. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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07-31-2014, 12:35 PM	#18
mmprestine Join Date: Feb 2009 Location: Green Bay, WI Posts: 82	Thanks for all the good info. Never used one on a 4-stroke but have on the 2-smoker dirt bikes. They always ripped like hell. The round slides have always seemed to give me everything I needed on a 4-stroke but would be fun to learn some more. Might have to try one of these out to see what changes I can get to the low end performance. Wish I had a dyno, sigh!
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