Motorcycle Carburetors

[Doug Riparetti]

Has anyone else successfully installed motorcycle carbs on there M10 or S14? I just surpassed the 51,000-mile mark with the 44mm Mikuni VM-series round slides on my S14.

 

I recall seeing a few post about guys attempting to install the Yamaha R1 motorcycle carbs, another post using a set of CV carburetor used on Harley's.

 

Checking see if they ever made any progress with their build?

Edited March 17, 2021 by Doug Riparetti

[John76]

Hi Doug,

I've always thought of installing 4 x Bing 40mm CV carbs on my stock '76...just for kicks.

Bore and stroke of my R100s (motorcycle) is almost identical to the M10 engine, so all I need is to boost the CR to 9.5:1, and I should (technically) get about 130 bhp. However, why not just go with twin DCOE's?  But I digress....still a '76 California car!!

 

 

 

[Mike G]

I don’t have experience with motorcycle carbs on a car but I have a lot of experience with snowmobile carbs on snowmobiles. Have you thought about switching to a racked set of flat slides? They take up a lot less space, are easier to sync, only need one throttle cable that mounts lower so your stock hood would clear and require less throttle pull effort than round slides (probably not a concern when using your foot instead of your thumb). 

[Doug Riparetti]

I tried flat slides on one of my race cars back in 2001, a Toyota 3TC, could not get them to work. Several guys at Meridian Speedway in Idaho tried on different motor combo's (Ford Pinto, Honda, Datsun & Toyota) with no luck. They all switched, or went back to the 44mm Mikuni round slides. 

Edited March 18, 2021 by Doug Riparetti

[Tdh]

Edit:  sorry Doug, sounds like you already knew what they were and what the deal is with them.  I was typing my post below as you  posted your response. 

 

 

 

Doug,

 

the carbs in your our photos are Mikuni’s.  The British guys seem to like them enough for Moss to have put together a kit at one point.  I’ve installed a few here and there on triumphs, MG’s, and at least one Austin Healey.  They employ a sliding door instead of a butterfly, so throttle response is a bit better than the SU/Zenith Strombergs on the Brit. Are I mentioned.  They idle great (all else being in good order), but don’t expect much more than cool factor for being different.  You’ll have to devise some type of cable throttle system to get them to work right as well.  Once they’re tuned, there isn’t much to go wrong, kinda like DCOE’s.   If it were me, unless you just enjoy playing with jetting, designing linkage, and working through getting things working right I’d just go with a 32/34 or a set of DCOE’s.  

 

Just my 2 cents.

 

Travis

Edited March 18, 2021 by Tdh

[Doug Riparetti]

Standard motorcycle cables that are available from Barnett Tool & Engineering in Ventura, California.

 

[TobyB]

Why not some old SU's for the truly vintage carburetion discomfort?

 

t

hs6

[Doug Riparetti]

Years of racing circle track dating back to 1997 with these carburetors made my decision to go this route.

[popovm]

19 hours ago, Doug Riparetti said:

Has anyone else successfully installed motorcycle carbs on there M10 or S14? I just surpassed the 51,000-mile mark with the 44mm Mikuni VM-series round slides on my S14.

 

I recall seeing a few post about guys attempting to install the Yamaha R1 motorcycle carbs, another post using a set of CV carburetor used on Harley's.

 

Checking see if they ever made any progress with their build?

 

 

That's hot. Nice work. Custom manifolds? 

 

The cheap ass (maybe also naïve? asinine?) side of me is wondering if it's possible to find some old superbike carbs and save myself a few hundred bucks over dual Webers. 

Edited March 18, 2021 by popovm

[Doug Riparetti]

You can buy all four Mikuni carburetors brand new off of eBay for less than $550 delivered, the little rubber boots that mounts to the M10 intakes cost $25 apiece, throttle cable, I think it’s around $150.

Edited March 19, 2021 by Doug Riparetti