Ulmer bushings too tight?

[Grimm]

I'm in the middle of installing the oilite bushing kit for my Nytro and have a concern.

When I reinstall the A arms on my sled and tighten bolts to spec, the arms are difficult to move. Looking at where the bushings meet the subframe, the bushing actually moves and rubs against the subframe, thereby not using the bushing to collar coupling like it's supposed to.

I've installed the oilite bushings are seated as tight as possible to the arms, so there's no room there. The collars float freely inside the bushings, so it's not binding there either.

Using a micrometer, I measured the thickness of the lip of the bushings to be 0.1mm thicker (averaged) than the stock ones. Could this pose as a possible reason for extra tightness?

Anyone else encounter similar issues installing these bushings?

 

[arteeex]

I would be concerned with setup you are describing. The bolt needs to tighten down on the sleeve and NOT the bushings. If you're clamping the bushings between the mounting surfaces they will wear or be displaced allowing the bolt to become loose. If you're certain the bushings are well seated in the a-arm then thin out the shoulder with a coarse file until the sleeve is the longest feature of the assembly by a little bit.

Add Loctite to the threads while you're in the business too.

 

[big_red1a]

My upper ulmer oil-light a-arm bushings on my apex did not even fit I had to leave those 4 stock. I tried putting them in the freezer overnight and cracked one with a rubber mallot. Contacted Ulmer with no reply

 

[grizztracks]

I've been debating which bushings to go with. I replaced all the bushings in my Vector with the Pioneer Performance kit. They're made out of Nylatron. I don't know a lot about the material but they seem to be holding up and are cheaper than Ulmer's.

Pioneer is just up the road so I think I might take a drive this week and pick up a set.

 

[Grimm]

I ended up calling Allen at Ulmer and he said that it is normal and that after a mile or so, the bushings will break in all will be good.

I feel much better now.

I already know to loctite the A arm bolts...I already had it back out last year...before the bulletin from Yamaha.

 

[09nytro]

pioner makes a bushing kit for the nytro

 

[Crewchief47]

I would say that if you tightened the bolts and the arms were stiff to move but did move (wouldn't hold a case a beer up) then they'll wear in nice. If you tighten them down and it holds that case of beer, than you should hit the thrust surface real quick with a file, as was suggested by someone else. It likely won't take more than a couple passes with a good file and you'd only have to do one end as well. Custom fit bushings ROCK! (to a point )

 

[Alatalo]

after a mile or so, the bushings will break in all will be good

Then you better confirm the tightening torque - after a mile or so...

 

[LJ 452]

Mine were the same way two years ago, after the first day I checked the bolts, re-locktite. No problems since. They haven't worn the center shaft or the bushing at all. Much better then what I have heard about the stockers.

 

[Srxspec]

The spacer inside the upper a-arm on the FX Nytro models seems to vary about .004" to .005" from one sled to another. If the a-arms are "stiff to move" but still move when pushed on they will be fine after a few miles. Always go back and check over your bolts after several miles as well to ensure nothing is coming loose.

big_red1a, did you email us during the season? If it was during the month of January or February please contact us again. Sometimes emails will go into our bulk mail folder and we simply miss them when trying to sort through the folder.

 

[NyTrOMaNIaC]

Mine were stiff at first, but loosened up right away under a load, totally normal. Front end is TIGHT now