Kawi2strokes.com Forum

I keep posting about vintage MX, sorry about that, I DO own an S2....its just that you guys are the best bunch of gearheads that I know. Taking care of a triple will do that to you I guess.

Heres my latest MX dilemma. I broke one of the mounts for the float arm on my KX400 carburetor. it came off near the base. (Trying to clean out the carb trackside). That ended the KX's day, luckily I was running multiple classes on different bikes. I have, left from an abandoned project, a carb from a KX420. Its similar in size, the spigot is the same, the bell is a bit longer but I think it will mount to my airbox. Heres the weird part. The slide has ZERO cutout. NONE. And, the carb has NO idle stop screw. The casting is there, but it is pliugged off and not threaded. The zero cutout slide has no ramp for a idle screw anyway. On some of my old rotary valve stuff, Ive had the idle screw coming off the top of the cap, but theres nothing like that on the 420 carb.

How the heck did that work on the 420? No cutout and no idle stop screw? I could put the slide from the 400 over into that carb body, and indeed i planned to transfer the jets because I liked how the thing ran, but that still leaves me with no idle stop.

Alternately, has anyone had any luck having one of those float mounts repaired? I am a novice when it comes to welding aluminum, I only have access to crude equipment for that or I would try it.

THanks for any ideas or suggestions

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1972 S2 350, 1972 F9 350 Bighorn, 1975 KX400, 1981 YZ465, 1980 XT500 (Built for MX) , 1987 KD80, 1995 MZ Skorpion, TTR 125, 1994 KDX200 , 1978 Mobylette, 1985 KX350R-F91m (Frankenstein) and a Doodle Bug

JB Weld???

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Answers are here: http://kawatriple.com/

X2 on the JB Weld, I JB Welded a Farmall carb 22 years ago and its still holding today

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1975 S3 project bike
1974 H1 project bike
1972 Yamaha R5
1974 Yamaha RD350

I love JB Weld

Way, way back in the day, I had a CX500.

Riding about 35 down a street near campus, someone threw a football and it hit me square in the head, causing me to wreck.

Looking back on it now, damn that must of looked funny, but anyway....

The cylinder head had a section ground out from the road (as did a huge percentage of my body, worst road rash I think I've ever had) and I used JB Weld and out oven to cure it. Kicked ass, worked great, but the wife banished me from ever using a household appliance for working on "stuff".

No more dishwasher as a parts cleaner, nothin, and I'm OK with that.

That reminds me, the day after that crash I called in to work "sick", We had inventory the day before, I had it all done, but the boss at the time told me to come in.

I tried to explain what happened, he did not give a crap, he demanded that I come in. Which I did. He handed me count sheets and told me to recount the second floor, they "lost" the earlier count sheets.

I spent the rest of the day recounting that area, probably 15000 sq/ft and hundreds if not thousands of items, in pain that only someone who had had significant quantities of road rash can appreciate.

Brought the count sheets down mid-afternoon, found the boss finalizing the inventory, jerk said he found the sheets and "forgot" to come tell me.

He was cool in some way, but a total asshole in others, I'm sure we've all had bosses like that before.

Oh well, it's what makes us who we are today.....

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steve

I thought about JB....was worried about gas resistance, but come to think of it it was the only thing that worked a few years back on a KX250 that i had, repaired the plastic gas tank with several things that failed, then good old regular JB did the trick.

It would make me nervous I guess.....knowing its in there gooped up like that......LOL I dunno. I will measure the 420 carb properly..try it for fit....i could drill out the idle stop casting and thread it....if the slides are the same exactly....and hack off an inch of the bell even.....

There are two more events I could reasonably make it to this year. I may have to pull out the old bighorn and rest the KX.

I wrecked twice on my 465. it was VERY muddy there, once was a nice soft plop.. fell over going very slow. No problem, tweaked my shoulder a bit. Next time the track had been drying out, and I got over confident in the same section I crashed in the first time...I started to go down, tried hard to correct it, the bike lurched VIOLENTLY the oposite way, and I bailed off the bike to avoid going over the bars. Hit the ground and rolled, whacked my head and got a SUPER cramp in my leg from the crazy angle it took when I stepped off. THe throttle had stuck wide open and hurt as I was I hopped over to kill the thing, then caught my breath. Then pushed it off the track.....had a nice headache the rest of the day and my right hand is numb/tingling still. Of course there will be the monday morning limp at work tomorrow. I swear its worse 2 days later. Fun times! Best thing is my son got film of the wreck, it sure doesnt look impressive though. Felt worse than it looked!

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1972 S2 350, 1972 F9 350 Bighorn, 1975 KX400, 1981 YZ465, 1980 XT500 (Built for MX) , 1987 KD80, 1995 MZ Skorpion, TTR 125, 1994 KDX200 , 1978 Mobylette, 1985 KX350R-F91m (Frankenstein) and a Doodle Bug

Hey Im Jared from the vinduro board, small world huh? I'm thinking a 36 will be the largest mikuni I have but I know a lot of bike guys so I may still dig one up. Till then I'm still in Key Largo shootin beaver .

If it's an aluminum carb, aluminum brazing should work fine (Lumiweld) Or you can JB weld it, You just have to cut in some undercuts. The fuel won't hurt the JB Weld, but you can soak in some super glue to seal it.

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........