• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Front sprocket, is yours on the wrong way..?

kiwiape

kiwiape

Husqvarna
AA Class
This will most likely stir some comments.....is your front sprocket on the right way?

From factory my front sprocket had the boss to outside. When I replaced it at about 20,000km I did the same. But during the weekend I was checking the chain and with it in 1st gear and trying to turning the rear wheel backwards whilst sighting down the chain I noticed the chain hooping toward the center of the bike suggesting something was not right. After checking and double checking the index marks on the adjusters and measuring the axle to swing arm pivot lengths were equal, I pulled off the front sprocket and noticed a wear mark on the inside consistent with the something out of alignment and being I had eliminated the rear axle and the cush hub has new bearings and the swing arm bearings feel tight, I started looking closely at the built-in offset on the front sprocket. If the sprocket is flipped it should help alleviate the wear issue I am having.

My next task will be to check alignment and see if I can prove my theory.

It will interesting to here your guys comments on what you see on your bikes.....

Attached is the manual picture and pictures are of OE sprocket and JT.

So, which way round is your sprocket and do you have any wear marks on the inside like I do?

Page_F1-12.JPG

20180416_182702.jpg

20180416_182711.jpg
 
the "boss" is supposed to be on the outside. Was and is like that on both my Terras and i don't remember such a wear pattern when i changed chain and sprockets. I think it was reported here that the chain rubs on the frame if you mount it the other way around or something like that. If the chain moves to the center of the bike i'd expect the wear to be on the other side of the sprocket?
 
CarstenB said:
the "boss" is supposed to be on the outside. Was and is like that on both my Terras and i don't remember such a wear pattern when i changed chain and sprockets. I think it was reported here that the chain rubs on the frame if you mount it the other way around or something like that. If the chain moves to the center of the bike i'd expect the wear to be on the other side of the sprocket?
Click to expand...

So I have checked the alignment and the front sprocket (with boss to outside) and it is out of alignment. Flipping it over puts it ni-on perfect. I am running DID VM2520 chain (very narrow for its size) and will most likely get away without chain hitting the frame. The lower foot peg bolt protruded by about 3mm which I have shortened to reduce any problems.

Shifting the rear sprocket over by machining the cush drive hub is also an option, this would allow front sprocket to run with boss to outside.

It will be interesting to here if others are seeing the same problem...
 
kiwiape said:
It will be interesting to here if others are seeing the same problem...
Click to expand...


Haven't got the time right now, will have to wait until the weekend.
I've also only ever mounted the JT sprockets with their part numbers readable from the outside, maybe they've got it wrong on this one?
Checking won't hurt.
TKS for the heads up
 
CarstenB said:
any chance that the swing arm is not properly centered?
Click to expand...

I'll check but its never been off since factory.

Just checked the manual and it appears the RH side of the bike is the "index" in other words the adjuster spacer is tightened to move arm across to the right side of the bike (does that sound right?) and mine appears all the way across. I physical check it later.
 
glitch_oz said:
Haven't got the time right now, will have to wait until the weekend.
I've also only ever mounted the JT sprockets with their part numbers readable from the outside, maybe they've got it wrong on this one?
Checking won't hurt.
TKS for the heads up
Click to expand...

My JT rear can be mounted with offset in or out, mine is out....(the flat side against the cush drive). So if I flip it, it will help when front is mounted with boss out, but its not enough to get fully in line. Rear offset is about 1.5mm, yet front boss is about 3mm.
 
Kiwiape, I just saw this thread. I have the opposite wear on my countershaft sprocket(on the outside). Mine looks like
it is the original sprocket? The flange is on the inside and it is stamped EXT on the flat side. Also the flat washer is missing,just the cone washer and securing bolt. I ended up stretching a string across the rear sprocket to the front.
It lined up perfect. I am confused, I thought I would find it showing the front too far to the outside causing the wear.
I have never saw this condition ever before on any mc owned. I too wonder if anybody else has any input. Thanks
 
Jim Wallace said:
Kiwiape, I just saw this thread. I have the opposite wear on my countershaft sprocket(on the outside). Mine looks like
it is the original sprocket? The flange is on the inside and it is stamped EXT on the flat side. Also the flat washer is missing,just the cone washer and securing bolt. I ended up stretching a string across the rear sprocket to the front.
It lined up perfect. I am confused, I thought I would find it showing the front too far to the outside causing the wear.
I have never saw this condition ever before on any mc owned. I too wonder if anybody else has any input. Thanks
Click to expand...

Can you take photo of your sprocket and put it up please?
 
I looked at it again and found I have old timers, the flange is outward and stamped EXT.As a last resort, I pulled the swingarm up to put the suspension in riding position. The chain seems to run straight and true on the sprockets. The rear has no real wear like the front. All I can think is my front sprocket is wearing out? Kiwiape,I reread your posts. If you have any chain looping, your sprockets are out align. I took off the chain guard to look along the top of the chain. It gives one a better view. Also looking at your first sprocket pics, the one on the right seems to have a champher built in where as the JT one does not? Can you try stretching a string across your sprockets with the chain removed?
 

Attachments

  • sprocket 002.jpg
    sprocket 002.jpg
    64.8 KB · Views: 38
I used a chain guide "sight" and it confirmed it was out of alignment...if you wind the rear wheel backward in gear the chain will hoop if out of alignment. With boss to inside the alignment is almost perfect compared to boss to outside.
 
You must log in or register to reply here.
Back
Top