Ironhead Pinion shaft roller bearing plug fit

[Jaime1840]

Hey guys!

So, while Im waiting for my transmission parts to arrive I´ve been checking other stuff from the bottom end.. When I took apart the engine the pinion shaft rollers looked okay, they weren´t worn, burned or damage.

But there was a lot of stuff put together the wrong way in this bike so I would like to check if the roller size is the correct one.

Searching arround the forum I found a thread that gives a formula to determine the plug fit instead of buying different size rollers and trying them on. Does anybody know if is this is right? I have attached a link with a picture of the thread Im talking about.

Also, when I pulled out the transmission instead of having rollers in the mainshaft like the ones in the manual, it had a needel roller bearing (Maybe its an upgrade from the old rollers?) I was thinking on buying the oem rollers and I was wondering if I could use the same formula as the one used to determine plug fit in the pinion shaft rollers.

Does anybody know if there is another manufacturer besides jims that makes a cheaper sprocket shaft Timken bearing assembling tool or somebody has a used one for sale? The price for the jims one in Europe its 200€....

thanks in advance, you guys are really helping me out with this build.

https://postimg.cc/wyMGYsp8

[IronMick]

Originally Posted by Jaime1840

... https://postimg.cc/wyMGYsp8

Nothing "technical" in this link?

[Jaime1840]

Originally Posted by IronMick

Nothing "technical" in this link?

What do you mean? English is not my mother language, I might be missing something.

[GA_Ironhead]

Direct link to the thread: http://xlforum.net/forums/showthread.php?t=1124372

[Ferrous Head]

Also, when I pulled out the transmission instead of having rollers in the mainshaft like the ones in the manual, it had a needel roller bearing (Maybe its an upgrade from the old rollers?) I was thinking on buying the oem rollers and I was wondering if I could use the same formula as the one used to determine plug fit in the pinion shaft rollers.

I presume here your talking about the right side case bearing ?

It is not common but some people replace that bearing, usually with a ball bearing.

The case has to be machines to make the fit though. To go back to the original set up now might require a lot more work.

If it's set up to use a captured roller bearing there I would stick with that. Most likely a metric one and easy enough for you to find.

[ryder rick]

What year cases?
I think 84 & 85 had a needle bearing

[IronMick]

Originally Posted by Jaime1840

What do you mean? English is not my mother language, I might be missing something.

Sorry. What I see in the link is no picture of the parts you were discussing, only some advertisements, some of which I would not show my children

[GA_Ironhead]

OP has posted elsewhere about a '74...

[Jaime1840]

Originally Posted by GA_Ironhead

Direct link to the thread: http://xlforum.net/forums/showthread.php?t=1124372

Thanks

[Jaime1840]

Originally Posted by Ferrous Head

I presume here your talking about the right side case bearing ?

It is not common but some people replace that bearing, usually with a ball bearing.

The case has to be machines to make the fit though. To go back to the original set up now might require a lot more work.

If it's set up to use a captured roller bearing there I would stick with that. Most likely a metric one and easy enough for you to find.

Hey Ferrous Head,

Yes, Im talking about the right side case roller bearings.

It looks like the race has been replace but I dont know if the case has been machined, Im just worried because I havent seen anybody running a bearing like this and I tought it might be wrong, I just found a picture of it. I have attached a picture below.

https://i.postimg.cc/yNYbQqbB/gbxbearing.jpg

thanks