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Message started by paulmarshall on 12/06/12 at 10:08:11

Title: Mikuni TM36-68 Flat Slide Carburetor 36mm PumpCarb
Post by paulmarshall on 12/06/12 at 10:08:11

I am thinking of replacing my carb. I understand that Lancers Performance -36mm Mikuni VM round slide carburetor and Savage-Robs -Amal Mk2 are both very efficient at improving performance. I would like peoples thoughts on the Mikuni TM36-68 Flat Slide Carburetor 36mm PumpCarb.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by verslagen1 on 12/06/12 at 11:24:28

Really would depend on where you wanna go and how you want to get there.

The road to the VM is a known path and there's quite a few people on it to help you out.

The road to the TM is a bit foggy, there's people on it, but they speak a different language.

So do you want to travel a short straight road, or long twisty one?

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by houstonbofh on 12/06/12 at 11:55:17

273423223D3036343F60510 wrote:

So do you want to travel a short straight road, or long twisty one?

Perhaps the wrong analogy to use with a biker... I know I love the long twisty roads! :D

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by paulmarshall on 12/06/12 at 11:58:38

392A3D3C232E282A217E4F0 wrote:

I would prefer to travel a path with a knowledgeable guide. I found a VM on ebay and asked about a cable and manifold for a Savage and he replied and I quote "I think you might be better off with a pumper carb (accelerator pump). See this eBay item number: 170616515481 - Mikuni TM36-68 Flat Slide Carburetor 36mm Pump Carb".
The TM is twice the price which is prob why he suggested it, $269 compared to $112 for the VM. I dont mind paying more for quality. I have been known to travell where no man has gone before, However when possible I try to research.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by paulmarshall on 12/06/12 at 14:19:34

Looking at the pic closely It would appear our stock cable can be used.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by Cavi Mike on 12/07/12 at 01:35:09

3120342D2C20333229202D2D410 wrote:

I have been known to travell where no man has gone before

You're confusing stupidity with bravery.

The TM is just a flat-slide version of the VM. Most of the parts are swappable between the two like the jets and needles - just one is a flat-slide and one is a round-slide. Flat-slides have no negative aspects except for price.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by LANCER on 12/07/12 at 03:48:03

I don't remember the details of the throttle cable attachment on the TM carb and am not home where I can check the manuals, but it looks (parts diagram online) to be similar to the VM carb and the stock LS650 cable will not work on it. Even if you can make it work I would suggest having a new cable made to fit your "model year" LS650 and the TM carb specifically, if you decide to go with that carb. The throttle action will be much smoother, giving you better control.
I have Barnett make custom cables for my carb kits, with exact throttle connections for each of the 3 model types used on the LS650.
Motion Pro, sold through Sudco and other dealers, also makes custom cables but I've not used them so don't know whether they have the specifics on the "model year throttle ends" we need. You would have to talk with them.
It does look like the main and pilot jets are of the same group but I don't sizes they are. You will very likely need to change them, just as required on the VM carb. The needle jet and jet needle are different than on the VM, so I cannot suggest anything there. I just don't know what the needs will be with the TM on our engine.
In totally form, the TM will flow a little more than a VM in the low and half way through the mid throttle range, but beyond that there is no difference. A VM with a UFO installed will out perform the TM in the low to mid range.
You just have to weigh the costs and expected amount of work you will need to do ....( LOL ... Which always turns out to be more than anticipated ) but that is half the fun in finding out how things work.
Getting it mounted is the easy part; working out the jetting is where the grunt work comes in. It is one of those "Patience Grasshopper" things. ;)

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by Dave on 12/07/12 at 06:08:10

OK.....I got a stupid question.....but that won't stop me.

Who cares about flow at partial throttle? If one carb flows better than the other at partial throttle......you can compensate by just using a bit more throttle on the carb that flows less efficiently. The carb and throttle are supposed to be restrictive by nature - that is how you control the speed and keep things under control. If flow at tull throttle is comparable - both carbs should provide equal HP at full throttle.

It may be that by having a carb that flows more efficiently at partial throttle settings - you get an engine that is more efficient and runs smoother, and that is the advantage of a more efficient flowing carb. Currently my stock carb is running really smoothly and it is a joy to ride the bike. My stock carb may not be the most efficient or the fastest - but 98% of the time I am just cruising around at 1/4 throttle enjoying the THUMP tic tic THUMP tic tic THUMP tic tic THUM tic tic THUMP tic tic THUMP tick tic ;D.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by Paraquat on 12/07/12 at 11:13:28

You should buy mine. It comes with jets.

--Steve

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by clearush on 12/07/12 at 19:51:02

it does look like it might take our stock cable maybe??

http://www.nichecycle.com/mmNCS/Images/tm36-68-4.jpg

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by paulmarshall on 12/07/12 at 20:00:32

I couldnt find a pic of that side. cant see where the fuel hose connects.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by verslagen1 on 12/07/12 at 20:00:34

is set up for a push/pull cable.

you need to set up a clamp to hold the end of our single.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by Dave on 12/08/12 at 11:53:24

45544059585447465D545959350 wrote:

I couldnt find a pic of that side. cant see where the fuel hose connects.

It looks to me like the connection for the fuel hose is hidden behind that white knob. It is on the side of the float bowl and the connection angles down and to the left in the photo.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by verslagen1 on 12/08/12 at 12:24:14

yep, swivel connector.

white knob is idle speed.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by smokin_blue on 12/23/12 at 19:33:47

I have a TM36 for my build but it is not the pumper so the cable comes straight in the top somewhat similar to a VM set up. I had a custom cable made by Motion Pro. They were great to deal with. I also however changed to a CR throttle housing for the twist grip since I am running 7/8" clubman bars.

Your set up is for a push pull (two cable) set up. I would not recommend running that with less than two cables. For that you would want to look to a different throttle housing. I would suggest talking with MotionPro as they have many housings and can set you up with a cable once they know the carb and the throttle housing they are working with. From there they will also need to know how long you want the throttle cable outer sleeve. The throttle housing and carb allow them to calculate how much free cable sticks out of the sleeve lenght that you give them.

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by LANCER on 12/24/12 at 03:06:03

What did they charge just for the cable set ?

Title: Re: Mikuni TM36-68 Flat Slide Carburetor 36mm Pump
Post by Cavi Mike on 12/24/12 at 18:48:22

Don't worry about running a single-cable. We don't run anywhere near the steady flow-rate of a multi-cylinder engine so you won't have to worry about the slide sticking from vacuum. A single cable will be just fine. Also - the return spring on the TM is VERY strong and I know this because mine just showed up in the mail. A multi-cylinder engine running multiple carbs off of a single linkage is when that problem will definitely occur.