http://www.nichecycle.com/ncs/mikuni/accessories/3638-1-ultimate-flow-optimizer-ufo-vm36-vm38.html
The company makes big claims. Looks like it should help.
Before. Turbulence from the shape of the underside of many round slides.
(https://live.staticflickr.com/65535/49792311937_f973267c0d_w.jpg) (https://flic.kr/p/2iRYBAR)ufo_flow1_2 (https://flic.kr/p/2iRYBAR) by Tony Kokonis (https://www.flickr.com/photos/150482584@N03/), on Flickrz
The parts.
(https://live.staticflickr.com/65535/49792313352_1d02b9e03d_k.jpg) (https://flic.kr/p/2iRYC2f)ncs-07021_1 (https://flic.kr/p/2iRYC2f) by Tony Kokonis (https://www.flickr.com/photos/150482584@N03/), on Flickr
After.
(https://live.staticflickr.com/65535/49791972431_bfe445616c_w.jpg) (https://flic.kr/p/2iRWSFi)
ufo_flow2_2 (https://flic.kr/p/2iRWSFi) by Tony Kokonis (https://www.flickr.com/photos/150482584@N03/), on Flickr
Quote.Normal gains are 3/4 to 1 HP per 100 cc of engine displacement on 4 stroke engines and 1 1/2 to 2 HP per 100cc of engine displacement on 2 stroke engines. (Re-jetting and tuning may be required).
Sooo, 7-9 extra horsies, nice.
When will you try it, Tony? ;)
That's a big claim, (and with VM carbs). The solution does make sense however.
Quote from: greenmonster on April 19, 2020, 04:56:11 AM
Sooo, 7-9 extra horsies, nice.
When will you try it, Tony? ;)
I'd try a TM flatslide first as they cost about the same price as a VM with that gadget. ;D I think that if you already had VM carbs, they are a good idea.
Notice that it requires a slide with a large cutaway.
Mikuni Models:
Mikuni VM36 Round Slide - Flange
MountMikuni VM36-4 Round Slide
Mikuni VM38-21 Round Slide
Mikuni VM38-9 Round Slide