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post #11 of 201 (permalink) Old 07-16-2008, 05:57 PM

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Congrats, Aje!!! Thanks for posting the followup, makes it easier for anyone else who wants to do the same.

Cheers,
-Kit
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post #12 of 201 (permalink) Old 07-17-2008, 03:08 AM Thread Starter
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Heres couple pics






Took her yesterday for a little ride, stopped to wash visor in water Vanaja.



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post #13 of 201 (permalink) Old 07-17-2008, 03:13 AM Thread Starter
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Quote:
Originally Posted by MotT3 View Post
Right that's it I'm getting a set....well I'd already made my mind up but that has confirmed the idea :-)

Several things will happen :

1. better MPG
2. Rejet the carbs to allow decibel killers to come out of the pipes
3. All the other stuff aje has just mentioned

Anybody want to buy a set of Mikunis this winter ?????

Any toughts about rejetting?
Theres now fully open Microns in.

I`m might put COUPLE set of Mikunis on sale too..
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post #14 of 201 (permalink) Old 07-18-2008, 01:24 PM
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Not sure aje...will do some searching on here & also ask my local freindly workshop..
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post #15 of 201 (permalink) Old 02-22-2009, 08:19 PM
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Hi folks and greetings from Scotland,

I`ve been doing a lot of research into tuning Keihin carbs as i`ve just gone across from my standard Mikuni`s which were fitted as standard to my 1996 speed triple.

There`s always loads of info on tuning Mikuni`s but very little about Keihin`s apart from in the cruiser sections.

Having had several long conversations with people in the know across here in the UK then i`ve come up with these settings which seem to work really well and do away with the flatspot/leaning out in mid range and pulls like a train at top end.

Ok, first off these bikes were first made for the UK and all tuning work was done to produce full power bike and to hell with the emissions!

If your outside the UK and you haven`t gained access to your pilot adjustment screws yet then that`s the first thing to get done as they need to be set to two and a half turns out and sometimes increased to three full turns depending on your setup.

Next is your pilot jets, these were always supposed to be 42`s instead of the 38`s that seem to have been put in the bikes when being exported. So get down to your local bike shop and get them replaced for the proper size 42`s.

Main jets are the next thing and this is your top end power comes from. Depending on the air filter and exhaust system you run can make a huge difference to this.

For a standard triumph air filter and standard exhaust then 125 main jets will give you decent power.

For a K&N in airbox filter and an aftermarket exhaust system then 140 main jets are the ones i`d recommend.

And finally we get to the individual pod filters and full on race type exhausts which i personally run as i`m sick of fighting with the airbox! For this setup i`m using 152 main jets and the bike is running very well.

Last but not least is the jet needles and the setting of them as the Keihin needles don`t have any slots to adjust them.

Using the standard needles that are fitted to your carbs is fine but get two 0.5mm shims fitted to each needle so it raises them slightly and allows the power to come in earlier.

There`s been lots of talk on the cruiser section about the so called Thruxton needles and you might want to give these a try but you`ll only need one 0.5mm shim if your using these needles.

Hopefully this will help some of you out as it`s taken hours of stripping out carbs and refitting them to come up with these settings.

One final thing is if your taking your carbs off then always remove the cable from the handlebar and pull the carbs free with it still attached otherwise you`ll have no hair left first trying to get the cable off the carbs when they`re fitted on the bike and your next stop will be the funny farm when trying to refit it.

Cheers, Matt
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post #16 of 201 (permalink) Old 02-23-2009, 07:51 AM
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Hi Matt,

I'm really interested in your pod set-up as not too many people have had any success with pods on CV carbs. So, a few questions:

Do you have the part number for the pods?
Do the pods fit without "massaging" them into shape?
What exhaust do you run with this set-up? Any baffling at all?

Cheers,

Roden
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post #17 of 201 (permalink) Old 02-23-2009, 08:34 AM
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Hi Roden,

I though this might cause some interest hence i posted the settings up.

Ok, pod filters. At the moment i`m just running the cheapest versions you can get from either your local bike shop or from ebay. As long as they have a 54mm and conical shaped they`ll fit fine. Now i know that people will do the "but they`re not K&N`s!" but pods need to be replaced more often than in box filters so why go to the hassle of cleaning and then re-oiling them when these are cheap and you just buy a new set.




Massage filter to fit the carbs.......no!

The exhaust system i`m currently using is a 3 into 1 Remus system using a stubby race can with very little baffling but i`ve also tried this setup using a longer titanium dual output can with far more baffling and it works fine with that as well. I`m a bit of a hoarder and also have a full 3 into 1 micron system which i tested as well with the same results

Full Remus system



Race can size compared to a haynes manual as most people will have one



Anymore questions then just give me a shout and i`ll do what i can to help.

Last edited by matt.speedtriple; 02-23-2009 at 11:37 AM.
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post #18 of 201 (permalink) Old 02-23-2009, 11:14 PM
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Any good source in the US (online) for Keihin CVK jets and and shims?


I've got a set of Keihins I have been working on and they are not quite right for my set-up. I am still fiddling them in at my usual distracted pace mostly as an experiment. Others in the forum have repeated that properly set-up Mikunis have better throttle response (but poorer economy) and on my Trident they are superb, lots of pull on take-off. I have not gotten the same feel out of the Keihins yet.

If you are putting later model Keihins on an earlier bike like a '95 with Mikunis and keep the standard airbox, the airbox rubbers/throats need to be changed as well as the clamps (Norma 60mm vs 66mm IIRC). The expansion rings inside the rubbers have different part numbers but they look to be the same on my bikes.

While the earlier choke cable fits sorta ok (routes differently), I found the original throttle cable with the metal elbow binds terribly for me as the cable on the Keihin mount point is lower down. The cable comes over the top of the engine and has to bend at an angle that does not complement the metal fitting very well and it makes for a very stiff throttle. I could not find a suitable re-route that made any difference that resulted in a throttle feel the same as the Mikunis.

I put the Mikunis back on until I get a later model cable.

And whoever clued me a couple years ago into splitting the back half of the airbox so it can be mounted last instead of having to d*ck with it deserves an award - many thanks for many hours saved. Turns a pita project into a breeze.

Last edited by djw; 02-24-2009 at 11:20 AM. Reason: spelling
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post #19 of 201 (permalink) Old 02-24-2009, 12:31 AM

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I ended up getting my Mikuni jets from Dennis Kirk, of all places, but I had intended to get them from Cycle Recycle.

HTH,
-Kit
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post #20 of 201 (permalink) Old 02-24-2009, 04:40 AM
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I`m using the standard cables that i was using for the Mikuni carbs that were fitted as standard and having no problem at all with sticking cables or binding.

The cables are plenty long enough for the job but might require a bit of re-routing but that is not uncommon when your modifying something from standard. It`s certainly cheaper and quicker to re-route the cables when they`re already disconnected than pay out for new cables.

If you have a problem getting jets ect then give this place in the UK a shout as they`ll have whatever you need and as the bits are tiny then it shouldn`t cost much for postage.

http://www.allensperformance.co.uk/keihinjets.html

For the Thruxton jet needles then strangely the cheapest place is Triumph themselves and the part number is T1245031. These are often sold as pairs so remember and state you need 3 needles and they should cost you about $21 in the states or £17 here in the UK from Fowlers.

Last edited by matt.speedtriple; 02-24-2009 at 04:51 AM.
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