7800mi Service 16 Jackshaft upgrade and Driver/Shaft change 2017 Shaft/Bearing info

[ski]

I would if I were due to open it up but serviced it all in spring before we had any idea 17 bearing might work. Just wish someone would confirm bearing will work. I believe it will even work with 16 shaft. Just need to be sure. I think all these people updating to 16 will wish they did 17 to get rid of that Wobblebearing. 17 bearing has proven itself now.

Wait the 2016 unit is still a wobble bearing? I thought it was different... Is it just the tapered sleeve system they got rid of and beefed up the shaft then? Maybe I'll rush order a 2017 bearing then.

 

[cannondale27]

Wait the 2016 unit is still a wobble bearing? I thought it was different... Is it just the tapered sleeve system they got rid of and beefed up the shaft then? Maybe I'll rush order a 2017 bearing then.

Correct. 16 is still Wobblebearing. 17 is not. Thank you!

 

[cannondale27]

The bearing is still in the housing, so I'm not sure how else to heat it. I was planning to preheat the oven to 175°, then shut it off and put the complete housing/bearing in there for 20 minutes or so. I doubt the 175° heat will damage the bearing seal, as those types of seals see those temps or higher in automotive use all the time. I do have a press as well, but I'm trying to put as little strain on the bearing as possible. It is a new bearing... in that it was never used... that assembly was removed as the sled was built into a race unit.

Just use a propane torch on housing. Don't get flame near bearing. It will fall off bearing. Works great.

 

[ski]

I just noticed the 2017 chain case bearing calls for a 6206... same as the clutch side bearing. Yamaha's part number changed up slightly, but as far as I know a 6206 is a 6206... just need to pull the seals off.

 

[cannondale27]

I just noticed the 2017 chain case bearing calls for a 6206... same as the clutch side bearing. Yamaha's part number changed up slightly, but as far as I know a 6206 is a 6206... just need to pull the seals off.

That's all I did for lower chaincase bearing. They had brake side in stock. Removed seals and put it in. I don't know what the 17 bearing looks like though. It could have a metal seal or something odd. I should get one also for future.

 

[ski]

I gonna replace the wobble jack shaft bearing and test a double row ball bearing. A german FAG. Same size as the -16 wobble bearing I put in last season. I also order Sidewinder chain and upper gear.

View attachment 133518

SKF specs show the 4206 as 20mm wide rather than 16mm as the 6206 is. Is yours different?

 

[ski]

I think I figured something out...

Janne339 has a 20mm wide (4206) bearing that I think will work with the 2016 shaft. The old wobble bearing (2206) also shows 20mm wide.

The 2017 bearing (6206) is 16mm wide and will only work with the 2017 housing as the circlip location would be off be 4mm. There would likely be a difference in the shaft as well.

 

[cannondale27]

I think I figured something out...

Janne339 has a 20mm wide (4206) bearing that I think will work with the 2016 shaft. The old wobble bearing (2206) also shows 20mm wide.

The 2017 bearing (6206) is 16mm wide and will only work with the 2017 housing as the circlip location would be off be 4mm. There would likely be a difference in the shaft as well.

Good catch! Bet you are right. This is why we must look into this. Thank you. If I am cheap and I am I could forgo the 17 shaft which is thicker in middle for sure and use a spacer.

 

[cannondale27]

Without looking I believe the inner race of 16 bearing is wider than the bearing itself.Bet 4 mm.

 

[ski]

Without looking I believe the inner race of 16 bearing is wider than the bearing itself.Bet 4 mm.

nope... the 6206 is 16mm wide all the way
http://www.skf.com/group/products/b...ove-ball-bearings/index.html?designation=6206

I think I'll follow Janne339 and use the 4206. It is the correct dimensions for the 2016 shaft and has 2 sets of rollers built in!
http://skf-preview-e.partcommunity.com/3d-cad-models/sso/?varset={PRODUCTID=104004206}&email=support@skf.com&info=skf/bearings_units_and_housings/ball_bearings/deep_groove_ball_bearings/deep_groove_ball_bearings_double_row/bb2_001.prj

 

[cannondale27]

16 and 17 chaincase side bearings are a slip fit onto shaft. So as long as bearing itself is same width shaft would not matter since it is meant to slide on chaincase side. Brake side locates it. Bet would not even need spacer to locate clip.

 

[cannondale27]

nope... the 6206 is 16mm wide all the way
http://www.skf.com/group/products/b...ove-ball-bearings/index.html?designation=6206

I think I'll follow Janne339 and use the 4206. It is the correct dimensions for the 2016 shaft and has 2 sets of rollers built in!
http://skf-preview-e.partcommunity.com/3d-cad-models/sso/?varset={PRODUCTID=104004206}&email=support@skf.com&info=skf/bearings_units_and_housings/ball_bearings/deep_groove_ball_bearings/deep_groove_ball_bearings_double_row/bb2_001.prj

Chaincase side 16 is wobblebearing. Not 6206.

 

[ski]

Chaincase side 16 is wobblebearing. Not 6206.

I know, but I'm saying the shaft dimensions for the 16 wobble bearing (2206) are the same as the (4206) bearing... 20mm. So no need to worry about spacers to locate the shaft or bearing within the chain case. Although I see what you mean about the clutch side locating the shaft... the chaincase housing will still not have a properly located slot to hold the bearing in place. (without some kind of spacer)
Might not be a big problem, but as the case heats up with use, the bearing could potentially walk around... I'd rather avoid that.

 

[cannondale27]

I just looked. 16 inner and outer race is same widths. So Janne's Idea is best or a collar would definitly have to be made if using 16 shaft. I am thinking if they are using a regular 6206 they must have made the bearing pocket in chaincase shallower.

 

[cannondale27]

Two clips put inside behind bearing would make almost a 4mm spacer in chaincase. Just saying since double row bearing is once again untested. 6206 has been.