WP 4045 Question

I purchased a WP 4054 front end that I am planning to install on my 1986 400 Enduro. The lower triple clamp is stamped with a Cagiva logo. The lower stem bearing needed replacing so I ordered a new one – part #: 5-13-070-01 ("works for all models 1978-1989"). As the later model CRs came with these forks I thought I thought the bearing would fit but it is slightly too large. I'm thinking maybe the steering stem I have is cot compatible for what I want to do. Anyone out there have experience/information on this? Below are photos of the top stem bearing and the triple clamp. Thanks,

The original bearing cone and cup combination for your 1986 wr is the same as Husky bikes with steel steering stems up to around 2004. Some of the Cagiva era Husky bikes must have had an aluminum stem and that uses a different cone and cup combination. Some of the cagiva era sheets had errors if I recall making one think the outside diameter of the cup was 48mm not 50 and BMW edited those as I recall. I have used 2004 ktm front end but need the cone and cup combination, it has an aluminum stem. Chances are there is a cone and cup combination that will work for what you have. Put cone and cup and search my posts I know I looked in my box of neck bearings and made a post at one point. The lower seal may not work out as expected and the length of the stem may not be exactly perfect.

I did one front end swap, well I never installed and rode it but the bore of the cup was too small by just a tiny bit. I mounted the bearing on a vertical mill with a boring head but instead of a cutter I used this air tool that had the 5/8 inch part to go into the boring head and was essentially a die grinder I think kind of dremmel tool sized abrasive stones.

My front end swaps have been replacing the earlier clamps that have the rubber mounted handlebars. That came out real close axle offset plus clamp offset to original. The 86 with rigid handlebar mounting would not be as exact.

Probably hard to follow and I am not familiar with exactly what you have.

Fran, thanks for the info. It sounds like it might be simpler to source a lower triple clamp and stem from a '87-'89 CR model that came with the WP4054 forks.

are these forks from an 89-91 italian husky? these all seemed to have oddball bearings compared to the 92 and later, which used the same as the swedes.

what is the diameter of the stem where the bearing fits?

The stem is 24.97mm. The inner diameter of the bearing is 25.50mm.

Not sure what they came off of.

looked up the bearing
the 1990 1991 & 1992 Husky was the bastard years 800054630 is the part for those years
in 1990 the forks were WP 4045, does anyone have one of these they can measure the stem and head on or a bearing to check dimensions

I have a complete set of triples if your interested

I've got a set listed in the classifieds.