Changed my steering head bearings.... took some pics

thirdgenlxi · 08-03-2009, 03:51 AM

Yup, finally changed out my steering head bearings today. It was actually alot easier than I thought it would be! I didn't take nearly enough details pics to write up a how-to (sorry!), but I did snap a few along the way. This is the poor mans method, lol... I didn't have any of the "proper" tools (special socket, bearing/race drivers, hydraulic press, stands, etc), so I had to improvise, hahah

Improvision #1... all I had was a rear stand. If I tried to jack the front up with my floor jack under the headers, it would just tip over off the stand (of course I caught it before that actually happened). So I strapped it down to the stand

Then I fiddled with the jack some more and finally found a good balance point on the headers where it would go up straight

Take apart everything up top

Then pull it all out the bottom

Spare parts aside

Improvision #2 - didn't have the bearing race removers, so a long flathead screwdriver and a BFH had to suffice

Improvision #3 - didn't have the race installers, so I used the old races flipped backwards to pound in the new ones. Worked like a champ!

Lower

Upper

It's nice they give you some little indents on both sides to be able to get a screwdriver on the races to pound them out

Old bearings VS new bearings. The OEM ones are roller ball bearings, where as the new ones I'm using are tapered roller bearings from AllBalls

Can't forget the lube!! Put plenty of grease in the new bearings

Improvision #4 - didn't have any bearing drivers, so once again one of the old races fit perfectly to drive it down. I had this piece of pipe, but it wasn't long enough to hit with a hammer (although manual says to use a hydraulic press), so I had to use the weight of the pipe itself as a slide hammer to bang the bearing down

Took a few good smacks, but worked perfectly!

Gotta grease up the new races with plenty of grease too

This is the bearing preload adjuster nut... the one I didn't have the socket for. Usually you could use a screwdriver and hammer, but it must be torqued properly so I needed some way to get a torque wrench on it

Improvision #5 - I made this! It's just the lil spanner wrench that came in my tool kit for the rear shock. I cut a 3/8" square hole in the handle exactly 2 inches from the center point of the adjuster nut

Used the equation (ACTUAL = INDICATED x (WRENCH LENGTH + EXT. LENGTH) / WRENCH LENGTH). Found that my torque values went from 216 in. lbs down to 175 in. lbs. Worked like a champ!

Then reinstall forks

Snug everything up

thirdgenlxi · 08-03-2009, 03:52 AM

Then put everything up top back together

Front wheel and brake calipers back on

Tada! Good as new

Old bearings and races really didn't look bad at all for being original with 166,000 miles, but still they had a notchy detent previously

Surprisingly still turned very smoothly in the races by hand! I was expecting them to be all tore up

Sorry I couldn't do a more detailed write up.... was kinda in a hurry trying to get done before dark. Took the bike for a ride and it feels great!! Steering is super smooth with no notchiness anymore, and the bars are straight as an arrow going down the road. I'm happy now... that detent in the steering at low speeds was really getting annoying!

Gas Man · 08-03-2009, 01:24 PM

did you use a good syn grease in there?

Why tappered roller bearings? They had problems with those on the 954's in 2002... made the front end too loose. I know I went into tank slap at about 135mph back in the day.

When tightening the steering head, u used torque, but did you check fall away?

thirdgenlxi · 08-03-2009, 05:26 PM

Quote:

Originally Posted by Gas Man

did you use a good syn grease in there?

Why tappered roller bearings? They had problems with those on the 954's in 2002... made the front end too loose. I know I went into tank slap at about 135mph back in the day.

When tightening the steering head, u used torque, but did you check fall away?

Yea I remember the 954's having a recall on the steering head bearings, taking out the tapered roller and putting in ball bearings. The 954's have always had stability issues though, even with the ball bearings. F4i's have never had any such issues, and I know a good number of people that have switched to the tapered rollers without any problems.

I like them better just cuz they're generally more durable than the ball bearings, and don't develop the notches and detents that the ball bearings are known for

As for tightening them.... F4i's (just like the VFR's) use a torque spec only for setting the preload on the bearings. Most bikes you use the pull scale to measure the rotational resistance and just tighten or loosen the nut until the resistance is in spec. F4i's there is no spec for that, you just torque the adjuster nut down to 18 ft. lbs and it's done, hence the reason I needed to make my little spanner wrench tool to fit on my torque wrench

And yes I used good grease... and lots of it

Gas Man · 08-04-2009, 09:12 AM

Cool. I figured you did it correct but don't hurt to ask. Good pics!

HOw bad was it to pound in the new races? Could use 2 pieces of metal and a large bolt and squeeze them into place. Kinda like a cheap press idea.

'73 H1 Triple · 08-06-2009, 09:47 PM

Quote:

Originally Posted by Gas Man

Cool. I figured you did it correct but don't hurt to ask. Good pics!

HOw bad was it to pound in the new races? Could use 2 pieces of metal and a large bolt and squeeze them into place. Kinda like a cheap press idea.

The way he did it won't hurt the bearings at all due to the fact the pipe hit on the center carrier and not on the outer portion.

Jeff
machinist

thirdgenlxi · 08-06-2009, 11:04 PM

Quote:

Originally Posted by Gas Man

Cool. I figured you did it correct but don't hurt to ask. Good pics!

HOw bad was it to pound in the new races? Could use 2 pieces of metal and a large bolt and squeeze them into place. Kinda like a cheap press idea.

That would work too, though you'd still have to use the old races, as the new races set recessed into the hole so you need something the same size that'll go inside a little bit to get them in all the way. Not bad pounding them in though. They fit in there TIGHT, no doubt! But a couple good swings with a 6lb sledge and they went right in

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08-03-2009, 03:51 AM	#1
thirdgenlxi They call me a ride whore Join Date: Dec 2008 Location: Mills River, NC Moto: 2004 CBR 600 F4i Posts: 353	Changed my steering head bearings.... took some pics Yup, finally changed out my steering head bearings today. It was actually alot easier than I thought it would be! I didn't take nearly enough details pics to write up a how-to (sorry!), but I did snap a few along the way. This is the poor mans method, lol... I didn't have any of the "proper" tools (special socket, bearing/race drivers, hydraulic press, stands, etc), so I had to improvise, hahah Improvision #1... all I had was a rear stand. If I tried to jack the front up with my floor jack under the headers, it would just tip over off the stand (of course I caught it before that actually happened). So I strapped it down to the stand Then I fiddled with the jack some more and finally found a good balance point on the headers where it would go up straight Take apart everything up top Then pull it all out the bottom Spare parts aside Improvision #2 - didn't have the bearing race removers, so a long flathead screwdriver and a BFH had to suffice Improvision #3 - didn't have the race installers, so I used the old races flipped backwards to pound in the new ones. Worked like a champ! Lower Upper It's nice they give you some little indents on both sides to be able to get a screwdriver on the races to pound them out Old bearings VS new bearings. The OEM ones are roller ball bearings, where as the new ones I'm using are tapered roller bearings from AllBalls Can't forget the lube!! Put plenty of grease in the new bearings Improvision #4 - didn't have any bearing drivers, so once again one of the old races fit perfectly to drive it down. I had this piece of pipe, but it wasn't long enough to hit with a hammer (although manual says to use a hydraulic press), so I had to use the weight of the pipe itself as a slide hammer to bang the bearing down Took a few good smacks, but worked perfectly! Gotta grease up the new races with plenty of grease too This is the bearing preload adjuster nut... the one I didn't have the socket for. Usually you could use a screwdriver and hammer, but it must be torqued properly so I needed some way to get a torque wrench on it Improvision #5 - I made this! It's just the lil spanner wrench that came in my tool kit for the rear shock. I cut a 3/8" square hole in the handle exactly 2 inches from the center point of the adjuster nut Used the equation (ACTUAL = INDICATED x (WRENCH LENGTH + EXT. LENGTH) / WRENCH LENGTH). Found that my torque values went from 216 in. lbs down to 175 in. lbs. Worked like a champ! Then reinstall forks Snug everything up __________________ *-Jared* Black/Red '04 CBR 600 F4i - 253,500 miles and counting Black '89 Accord LX-i sedan - 435,200 miles still going strong States visited on my F4i facebook.com/thirdgenlxi

08-03-2009, 03:52 AM	#2
thirdgenlxi They call me a ride whore Join Date: Dec 2008 Location: Mills River, NC Moto: 2004 CBR 600 F4i Posts: 353	Then put everything up top back together Front wheel and brake calipers back on Tada! Good as new Old bearings and races really didn't look bad at all for being original with 166,000 miles, but still they had a notchy detent previously Surprisingly still turned very smoothly in the races by hand! I was expecting them to be all tore up Sorry I couldn't do a more detailed write up.... was kinda in a hurry trying to get done before dark. Took the bike for a ride and it feels great!! Steering is super smooth with no notchiness anymore, and the bars are straight as an arrow going down the road. I'm happy now... that detent in the steering at low speeds was really getting annoying! __________________ *-Jared* Black/Red '04 CBR 600 F4i - 253,500 miles and counting Black '89 Accord LX-i sedan - 435,200 miles still going strong States visited on my F4i facebook.com/thirdgenlxi

08-03-2009, 01:24 PM	#3
Gas Man Trip's Assistant Join Date: Feb 2008 Location: Imported from Detroit Moto: 2009 HD Street Classic Posts: 12,149	did you use a good syn grease in there? Why tappered roller bearings? They had problems with those on the 954's in 2002... made the front end too loose. I know I went into tank slap at about 135mph back in the day. When tightening the steering head, u used torque, but did you check fall away? __________________ -Chris "Why pay somebody else to fuck up your bike?" Run Amsoil Product

08-04-2009, 09:12 AM	#5
Gas Man Trip's Assistant Join Date: Feb 2008 Location: Imported from Detroit Moto: 2009 HD Street Classic Posts: 12,149	Cool. I figured you did it correct but don't hurt to ask. Good pics! HOw bad was it to pound in the new races? Could use 2 pieces of metal and a large bolt and squeeze them into place. Kinda like a cheap press idea. __________________ -Chris "Why pay somebody else to fuck up your bike?" Run Amsoil Product