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Mikuni VM34's on my TR1

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Mikuni VM34's on my TR1

PostAuthor: Fruid » Sun Sep 15, 2019 1:19 pm

After many months and headaches trying to get my bike to run right with the stock carbs I finally pulled the trigger on the Mikuni 34's kit for the Virago bikes.
I am in the UK so was very costly buying from the US with import duty.
Anyway fitted them very easily , the cable joint (2 into 1 thingy) sits under the tank and the carbs are so easy to fit. The original air tubes do fit just, not perfect but do fit.
Mine came with 22.5 pilot and 195 mains. I found it bogging down at WOT so fitted (with ease) 175 mains...now it's much better although the front plug is still a bit sooty so I'll try 165 in there.
I wish I had done this years ago, so easy to tune, you can drop the main out the bottom without having to take anything off the bike at all, the pilots you do but the carbs are so easy to remove compared to the Hitachi ones.
It starts easy although you do have to choke both carbs separately now, ticks over perfectly and pulls like a thing possessed.
It isn't quite right at 1/4 throttle yet but I think a bit of tweaking the needle height should sort that out.

I am so pleased.

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I've just fitted a 165 on the front cylinder and it's running better than ever. Next I need a larger pilot jet , mine is the largest that came with the kit but i'm still getting pops and bangs on the overrun even screwed almost all the way in.
One other thing to note, the throttle is so light , I think they could do with a slightly stronger spring in there.

Fruid
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Re: Mikuni VM34's on my TR1

PostAuthor: Fruid » Sat Sep 21, 2019 5:34 am

Quick Update...
I have put a 165 in the front and a 175 in the rear.
30 pilot jets (up from the 22.5's that came fitted, getting some hesitation and popping on overrun)
2 turns out on airscrew

Now runs perfect throughout the rev range and pulls very hard..these VM34's are fantastic and so easy to tune, you can change the main jet in 1 minute. 30 seconds to remove a carb from the bike.

Getting some clutch slip at WOT in 5th when the power kicks in..new clutch needed I think.

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Re: Mikuni VM34's on my TR1

PostAuthor: nanno » Sun Sep 22, 2019 10:57 am

Welcome to the world of power... :cl: Try new clutch disks, if that doesn't sort it, then you are on the right track power-wise. In this case have a look, how I built a 9-disk clutch instead of the stock 8-disk. (It's on the forum and on my blog.)
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

http://greasygreg.blogspot.co.at (My blog - Greasygreg.blogspot.co.at)
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