125-200cc Husky WR 125-08: My TMXX carb is too short!!!

[Johnnymannen]

Hello everyone! Just changed carb on my sons WR125-08 from the old TMX to my factory TMXX from my 300. Works rea´lly well, but the carb is about 10mm too short on the airbox side. Does anyone have an easy solution to this? Incredible difference compared to the factory carb=)!

Johnny

 

[dartyppyt]

Yes,

You have to take the 2 lower air box bolts out on the lower rear aluminum subframe. Drill the holes closer to the front so air box moves forward. In the rear up under the top 2 bolts, you might have to put a washer to shim it forward. Usually, just doing the bottom works. Use blue loctite on bottom bolts.

 

[john01]

Sounds like a plan to me; good luck Johnny.

 

[TROFFER88]

Reed spacer

 

[wallybean]

Tim is going to use a reed spacer and it should work well. I am not sure how much it will affect throttle response on a 125.

 

[TROFFER88]

I think I am going to install it on the manifold side .

 

[dartyppyt]

The 7 port cylinders like the same gasket that goes between reed block and cylinder, then same gasket between reed block/carb boot. Pulls the reeds out at about right spot. I tried other spacers at my elevations and didn't notice a difference. Just with the gasket it made a difference. If you are using the v-force 2 block , set the reed limiters on low. If you space the reeds out to far, you'll have negative results. The more tension on the reeds = more low end. If it is set on low and you want to try the high setting, make sure you use new reeds cause they can crack.

 

[TROFFER88]

Good to know thanks , it is the older cylinder so I don't know if that makes a difference. I am just trying to get the bike going until I do a winter Walt bigger bore kit .

 

[dartyppyt]

Good to know thanks , it is the older cylinder so I don't know if that makes a difference. I am just trying to get the bike going until I do a winter Walt bigger bore kit .

Great, keep us updated as you progress. Keep in mind, never give up trying different things. What works for me at sea level may not work in your elevations.

 

[dartyppyt]

Tim,

Was doing some thinking, actually took a nap. There might be some advantages to a reed spacer up your higher elevations. Like to here how it works, etc....

 

[TROFFER88]

Dartyppy,
what would the advantages be, I was just going to use the reed spacer to make the carb fit. I have the Rb mods done to my Tmxx , I have the 16-62 needle and 5 slide , what jetting specs do you suggest.

 

[dartyppyt]

That is good that you have the RB mods. Are you running the older V-Force 2 reed block? It has a high and low setting on the reed limiter plates. Make sure you set them on low. The V-Force 3 block is thicker, making up some difference. The 3 block, you cannot change tension on the reeds. Since the TMXX is a short bodied carb, it might benefit you in higher elevations lenghtening it (engine side of reed block). I put a gasket in front of reed block and one between reed block and intake boot. I think it worked some or my boot could of been leaking some air. On your jetting,maybe NW Rider/Walt and them can help you and they seem to run a lot lower pilots. Then depends on oil mix/race gas. I also look at the intake boot on the reed side. I kinda clean up the rubber casting, flow wise with a dremel tool. Then sand it real smooth so you have no air/fuel drag. You can tell by looking at it where you can improve it. Hope this helps.

Thanx

Darin

 

[Johnnymannen]

Yes,

You have to take the 2 lower air box bolts out on the lower rear aluminum subframe. Drill the holes closer to the front so air box moves forward. In the rear up under the top 2 bolts, you might have to put a washer to shim it forward. Usually, just doing the bottom works. Use blue loctite on bottom bolts.

Ok! Sounds like an easy fix then! Thanks!

Johnny

 

[Johnnymannen]

Sounds like a plan to me; good luck Johnny.

Thanks John! It was a big improvement with this carb as i had it laying around anyway:=)!

Johnny