You guys need to remember that Brian is SELLING services in that video. The straight bearing is installed in the 120Rs. We will see this summer, with the Hot Bagger class how well straight bearings hold up. Myself... I have NOT heard of a SINGLE SE upgrade straight bearing failure and assembly IS easier. There MAY have been a few failures early on... like 04-06, but since 09? Doubt it.

If I had a 'do over'... I would NOT have installed the timken in my bike. And I have 118 TQ with 100tq from 2500 thru 5500

Finally... me and Don disagree!!!

 

Start a new thread, don't hijack this one.

 

I would use 100 squared as my guide.anything more than that;do the upgrade!!!

 

The why for the MoCo is to reduce cost. Case assembly is easier with straight roller; no end play to deal with. The tapered bearing assembly on the clutch side of the crank is two tapered bearings that have to be assembled, torqued and end play measured. Once the end play is defined, the proper shim/spacer can be installed between the two bearings and cases assembled.

The "Lefty" bearing is the '07 upgrade, so if you have a later model, run it. My '02 had the Timken and I run the OEM bearings in the 107" in that bike. I also have an '05 95" running a completely stock lower unit. However, I will increase the displaeement on that engine in the not to distant future and will have the choice to upgrade to the Timken or the new Lefty roller. Since both are upgrades, I wlll go the Timken route. The Lefty may be stout enough but the Timken, IMHO, is more stout.

Only time will tell how the Lefty bearing will hold up in the 120R.

 

The dual tapered Timken bearings are super-strong, and we install them, BUT I will say this, that prior, to the advent of the conversion kits, we had several 116" S&S combo's, and a couple of 124"ers, we built, that are still in service, that were all well north of 135 hp/torque and have no issues still to date.
It's not the bearing that takes a crap, but the crank.
Once it sissors, it starts to gobble up the pump, the cam plate, and in certain cases, the bearings.
Scott

 

I agree with Scotty. MY crank scissored and I didn't really see any damage with the bearings. But.. I realize seeing isn't everything, so I DID the Timken and installed a SE Lefty on the right side.

AFter words... I have watched 4 different forums closely, along with my friends' various shops, and have NOT heard of a Lefty failure, so I have rethought the Timken thing. I, nowadays, recommend the Lefty to DIYers, because it is a much easier set up. Not everyone can set the Timken endplay correctly, but an INA is a piece of cake.

Yes... a Timken IS a stouter piece and surely CAN take more abuse... but... where is THAT line? 120s are running 130 to 140 torque and the Hurricanes are even more. I'm going to TRUST the MOCO on this one (stupid me?)... the 120 is meant to KILL the aftermarket... if it needed a Timken... it would have come with one. This time next year... this question WILL be answered.

 

Interesting data.
More than one way to improve this situation.
I have to check in to the SE upgrade straight bearing, if thats what it is.
Maybe like the cam bearings upgrade which goes with captured bearings rollers and more of them.

I see the SE upgrade is not captured roller like Torrington types.
I wonder if one of those would work though. Maybe SKF.
Or is needed with the SE available?

Course gotta go with the people you are doing business with. Kinda a package.

 

Thanks, I did understand the cost aspect and when I want to increase to a bit bigger motor, I now know the Lefty should be the minimum upgrade to consider.

 

Try real hard to sound smart, but the truth is you don't know shet about Harley's .Eventually everyone will figure you out and laugh as you write stupid crap..
In the meantime keep writing so it won't take so long for people to realize you're an Idiot..{I love my truk}

 

5 posts and who's the idiot? You've swam into the deep end of the pool without your life preserver....