Steering Head Bearings
How to install and adjust tapered roller headstock bearings. This is a lot of fun. No, really. If you survive removing the old lower inner bearing race, that is...(more on this later)
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Bearings: Theory and Practice
Get Your Bearings
Buying Bearings
The first thing to understand is that Honda doesn't make bearings—you don't have to pay Honda prices for bearings if you know how and where to get them. Most cities have one or more automotive bearing supply houses—industrial bearing supply houses are sometimes unable to acquire the same types of bearings used in automotive (and motorcycle) applications. But in order to help, you either need to know all of the dimensions and markings on the bearings you want to replace, or (better yet), take the old bearings to the bearing house for them to match. It is more effort to source bearings outside dealer channels, but there is usually substantial savings to be had—particularly with respect to the bigger bearings found in VFR/RVF rear wheel hubs...
Steering Head Bearings
How to install and adjust tapered roller headstock bearings. This is a lot of fun. No, really. If you survive removing the old lower inner bearing race, that is...(more on this later)
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Complete List of Bearings and Seals for VF750FP
All of the chassis bearings (i.e., nothing to do with the engine) were recently replaced on the official VSource.org VFR750FP. It was an expensive and time-consuming adventure, but most of the bearings were sourced from non-Honda suppliers—and the savings was substantial. The following chart was originally created by SAABDude and uploaded to the U.K.-based Honda VFR Club. Over several revisions, VSource.org subsequently expanded it to include certain additional bearings and seals, OEM part numbers and prices from additional suppliers, until it ended up in the form presented here. Later RC36s had a different rear shock linkage, but most of the other parts would be the same. (Note: The prices were accurate in 2005...)
Honda VFR750F-P—Chassis Bearings and Seals
(Based on 1993 U.K.-model w/1998 VTR1000F fork conversion. Read the Notes below. Use at your own risk!)
|
Description |
Type |
# |
Honda Part Number |
Original ID numbers |
ID |
OD |
W |
Comments |
Source |
Price each |
|
swing-arm main
bearing—left |
needle roller |
1 |
91071-MR7-003 |
HMK 2830 Japan
UU NTN |
28 |
37 |
30 |
caged rollers,
no integrated dust seals |
City DSS ACB |
£11.61 £9.08 £7.00 |
|
swing-arm dust
seal—left |
|
1 |
91202-MR7-003 |
SDO 28 37
4 A2 ACS |
28 |
37 |
4 |
|
City DSS ACB |
£2.20 £2.85 £2.50 |
|
swing-arm main bearing—right |
radial ball |
2 |
91072-MR7-003 |
6904 Japan WS NTN |
20 |
37 |
9 |
no integrated
dust seals |
City DSS ACB |
£4.20 £7.74 £5.85 |
|
swing-arm dust
seal—right |
|
1 |
91214-MR7-003 |
SDO 26 37
5 A5 ACS |
26 |
37 |
5 |
(26 37 7
supplied by City-might fit) |
City DSS ACB |
£2.20 £2.85 £4.20 |
|
swing-arm pivot
collar B |
inner race |
1 |
52106-MR7-000 |
N/A |
|
|
|
|
DSS |
£13.06 |
|
suspension
linkage bearing (at swing-arm) |
needle roller |
1 |
91071-KV3-005 |
BHM 1725 Japan Koyo |
17 |
24 |
25 |
no cage for
rollers, no integrated dust seals |
DSS |
£11.51 |
|
suspension linkage
bearing (in shock connecting rod & shock arm) |
needle roller |
4 |
91072-MJ0-003 |
7E-HMK
1725 Japan WS NTN |
17 |
24 |
25 |
caged rollers,
no integrated dust seals |
A&P DSS ACB |
£8.50 £8.87 £6.50 |
|
suspension
linkage bearing (at shock absorber) |
needle roller |
1 |
91072-KT7-003 |
7W-HMK 1720 NTN |
17 |
24 |
20 |
caged rollers,
no integrated dust seals |
A&P DSS ACB |
£8.50 £8.88 £ |
|
suspension
linkage oil seal |
|
8 |
91262-MG7-005 |
NOK AE8444H |
17 |
27 |
5 |
|
A&P DSS ACB |
£1.87 £2.06 £ |
|
suspension
pivot collar (shock connecting rod) |
inner race |
1 |
52462-ML7-000 |
N/A |
|
17 |
|
|
DSS |
£8.82 |
|
suspension
pivot collar (shock arm—at shock absorber) |
inner race |
1 |
52477-KT7-000 |
N/A |
|
17 |
|
|
DSS |
£5.08 |
|
suspension
pivot collar (shock arm—at swing arm) |
inner race |
1 |
52463-KV3-000 |
N/A |
|
17 |
|
|
DSS |
£5.51 |
|
suspension
pivot collar (shock connecting rod) |
inner race |
1 |
52463-MT4-000 |
N/A |
|
17 |
|
|
DSS |
£7.32 |
|
wheel
bearing—front |
radial ball |
2 |
91054-MN8-741 |
6004 |
20 |
42 |
12 |
integrated
black dust seals on both sides |
DSS ACB |
£11.00£5.50 |
|
wheel bearing
dust seal—front |
|
2 |
91257-KA3-711 |
AE1544F NOK |
28 |
42 |
8 |
|
DSS ACB |
£3.80 £2.00 |
|
sprocket
carrier bearing |
radial ball |
1 |
91061-MT4-003 |
DF 0768 LU
Japan NTN |
35 |
55 |
20 |
integrated
(red) dust seals on both sides |
City-5wk DSS DSS-wait ACB-3wk |
£25.20 £50.22£37.64£16.40 |
|
sprocket
carrier dust seal |
|
1 |
91258-ML7-003 |
SDO 45 55 5 ACS |
45 |
55 |
5 |
|
DSS |
£3.90 |
|
sprocket
carrier o-ring |
|
1 |
91352-MN8-003 |
N/A |
|
|
2 |
|
City DSS |
£0.42 £0.82 |
|
rear hub
bearing—right |
needle roller |
1 |
91062-MR7-003 |
8Q-NK
50x62x25-1 Japan WS NTN |
50 |
62 |
25 |
caged rollers,
integrated black dust seal on one side |
A&P DSS-wait DSS |
£10.69£30.82£41.09 |
|
rear hub
bearing dust seal |
|
1 |
91284-MR7-003 |
SDO 50 62 5 ACS
B8 |
50 |
62 |
5 |
|
City DSS |
£2.38 £4.75 |
|
rear hub
bearing—left |
radial ball |
2 |
91061-ML0-731 |
6908RS Japan
Koyo |
40 |
62 |
12 |
integrated
black dust seal on one side – plus plastic linking ring to lock both bearings
together (leaving single black seals facing outwards on each side) |
City DSS DSS-wait ACB |
£33.22£50.22£37.67£14.40 |
|
steering stem
bearing—upper |
angular contact
ball |
(1) |
91015-KT8-005 |
32005X Japan
MCI |
26 |
47 |
15 |
(note ID—must
be 26mm) |
ACB |
£8.40 |
|
steering stem
bearing—upper |
tapered roller |
(1) |
91015-425-832 |
N/A |
26 |
47 |
15 |
(note ID—must
be 26mm) |
DSS |
|
|
steering stem
bearing dust seal—upper |
|
1 |
53214-KA4-701 |
N/A |
27 |
48 |
4 |
metal ring with
rubber edge |
DSS |
£2.47 |
|
steering stem
bearing—lower |
angular contact
ball |
(1) |
91016-KT8-005 |
32006JR Japan
MCI |
30 |
55 |
17 |
|
DSS |
|
|
steering stem
bearing—lower |
tapered roller |
(1) |
91016-371-000 |
N/A |
30 |
55 |
17 |
(32006JRRS— has
integral dust seal) |
Moore |
£13.20 |
|
steering stem
bearing dust seal—lower |
|
(1) |
53214-371-010 |
N/A |
31 |
56 |
4 |
metal ring with
rubber edge |
DSS |
£3.50 |
UK-based Sources Key:
ACB = A.C. Belting Ltd, 58 Kingsholm Road, Gloucester GL1 3BQ (01452) 410 968 (Jason)
A&P = Angus & Perthshire Bearings, Unit 62A, Buccaneer Way, Perth Airfield, Scone, Perthshire PH2 6PL (01738) 553 479
City = City Seals and Bearings Ltd, 23/25 Stevenson Road, Sheffield S9 3XG (0114) 243 5343 (Jason)
DSS = David Silver Spares, Unit 14, Masterlord Industrial Estate, Station Road, Leiston, Suffolk IP16 4JD (01728) 833 020
DSS-wait = Optional 2-3 week wait, resulting in a 25% discount.
Moore = Moore International, 104 Ashley Road, Parkstone, Poole, Dorset BH14 9BN (01202) 462 220
Notes:
Steering stem bearings were originally angular-contact ball bearings; it is common to replace with tapered roller bearings, though these are more difficult to adjust properly. Tapered rollers are available from many aftermarket sources, but also from Honda (note that these Honda part numbers have not been verified). Both types of steering stem bearings use separate metal/rubber dust seals; but the optional tapered roller 32006RS lower bearing incorporates a dust seal, so no separate seal is required.
The top bearing used on many Hondas (including the VFR750FL-P) is a non-standard size. Although it is often marked "32005", it is actually a 32005 (this is an ISO standard bearing number) with a 26mm I.D. rather than the 25mm I.D. you might expect. Needless to say, this means it won't fit onto the steering stem no matter how hard you hit it. <G> Some bearing manufacturers helpfully call this bearing "32005/26", but some do not!
Front wheel bearings are for a ’94-’97 FR-FV, since the VSource.org FP uses a front wheel from a later RC36.
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Copyright © VSource.org 1999-201 [Created: 22 June 2005; Source: SAABDude from the Honda VFR Club] |