'74 JDX 4 Bendix car

jd ike · Post by **jd ike** » Sun Feb 10, 2008 8:45 pm

Okay, I just fininshed installing a fresh rebuilt motor, cleaned the carb and my brother and I painfully installed the rear suspension. I set the high and low needle jets to the correct spec (1 1/4 - 1 1/2 turn out from fully closed) and took it for a spin. When I stopped the first time the motor idled down so I adjusted the idle up, but after stopping the second time the motor idled too high so once again I adjusted the idle. I did this several times and then remembered an earlier thread where someone had a similar issue and the problem was an air leak around the throttle butterfly shaft so I wiggled the shaft and it had play from side to side (approx .06" from side to side). When I moved the shaft in, the engine would idle up and moved out, the idle would come down. I looked on Central Snowmobile and did a search for a Bendix rebuild kit online and found nothing. Does anyone else out there have or know where I could find a kit to repair this problem? Also, does anyone know how to remove the shaft? My repair manual says the shaft has a screw staked in place that holds it together, but it doesn't look to me that this is the case and the diagram I have doesn't show this part of the carb. Any diagram anyone might have would also be very helpful.

Thanks

S_Kyle · Post by **S_Kyle** » Sun Feb 10, 2008 9:30 pm

If you find a place that stocks kits let me know I buddy has been looking for a couple kits for a wile now. He has more or less quit looking because he was tired of getting laughed at when we go to shops and dealerships.

jd ike · Post by **jd ike** » Sun Feb 10, 2008 9:38 pm

As a last resort I was thinking on putting a Mukuni slide on, anyone ever done this? If so, what size carb should I use, main jet size, pilot jet size and needle jet should be used?

JDFanPa · Post by **JDFanPa** » Mon Feb 11, 2008 3:10 am

Theres always been people posting about no kits avail for the bendix. T avoid the hassle of the mik swap why dont you just run a walbro from a similar deere that way you can use the choke and throttle cables from any 00 x sled as well as the intake tube if you like. Is this an x4 or x4 special I thought only the specials came with the bendix my 74 x4 has a walbro but I have a x4 special motor and it has the bendix.

JDT · Post by **JDT** » Mon Feb 11, 2008 2:42 pm

A Tilletson Carb is a good choice to replace the Bendix also.

You do not have to replace the cables as you would with a Mikuni update.

jd ike · Post by **jd ike** » Mon Feb 11, 2008 2:54 pm

JDFanPa wrote: Theres always been people posting about no kits avail for the bendix. T avoid the hassle of the mik swap why dont you just run a walbro from a similar deere that way you can use the choke and throttle cables from any 00 x sled as well as the intake tube if you like. Is this an x4 or x4 special I thought only the specials came with the bendix my 74 x4 has a walbro but I have a x4 special motor and it has the bendix.

That's probably what I'll do...now I'll have to find one of those. My plan was to keep it all original as it is in very good condition.

My '74 X4 is a special, correct me if I'm wrong but Deere did not make a regular X4 in '74. That being said, all X4's in '74 would've been a special and had Bendix carbs...????

JDFanPa · Post by **JDFanPa** » Mon Feb 11, 2008 11:06 pm

jd ike wrote:

My '74 X4 is a special, correct me if I'm wrong but Deere did not make a regular X4 in '74. That being said, all X4's in '74 would've been a special and had Bendix carbs...????

Yes Jason you are right on about this I actually have four x4s and often end up confusing the years actually alot of the sleds listed in my signature have duplicate parts sleds and I get the years mixed up often. Good news on the walbro swap is your motor is the same as in the 400s except the 72 model so a carb and stuff from 1 of them would bolt right on and heck the settings would even be real close.

Like Todd stated a tillitson is a good carb also if you want to go non deere and you can always hang on to your bendix in hopes you find 1 of the golden kits for them. If you really want to stick to the bendix I would be willing to sell you the 1 i have for pretty cheap since I have no intentions on using it but I would have to check the condition.

jd ike · Post by **jd ike** » Tue Feb 12, 2008 3:43 pm

I removed the shaft and added a rubber washer between the carb housing and end of the shaft. This took up any slack in the system and hopefully helped seal the air leak. I will run it this weekend and post the results.

Thanks everyone

JDFanPa · Post by **JDFanPa** » Tue Feb 12, 2008 11:04 pm

good luck hope it works