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 Post subject: Re: Drive belt
PostPosted: 23 Jul 2024 09:43 
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Joined: 10 May 2019 23:31
Posts: 116
Current ride: XB12XT
Thanks Barney, but €230 plus VAT and shipping then Import Duty, say £250+

I found a Conti HB135-118 belt on eBay for £162 so I will try that. They can be had for €99 in Germany but out of stock and plus shipping etc. Continental is a good brand.

There are numerous belts on eBay at c.£50 but I’m not daft!

Pity about the Riders discount going, but Buellists are few and far between these days, even when the parts are available.


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 Post subject: Re: Drive belt
PostPosted: 29 Jul 2024 16:26 
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Joined: 15 Apr 2009 17:17
Posts: 8646
Location: Manchester
Some confusion here....G0500.1AKF is still an active part and available via Riders of Bristol, just had one delivered ! :?

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96 S2T
98 S1W
00 M2
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 Post subject: Re: Drive belt
PostPosted: 29 Jul 2024 19:17 
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Joined: 10 May 2019 23:31
Posts: 116
Current ride: XB12XT
Maz - was it £320? I didn't get the name of the parts man, but he insisted it was obsolete....

Waiting for my Conti belt to arrive (it is on the way) - let's see what turns up!


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 Post subject: Re: Drive belt
PostPosted: 30 Jul 2024 11:54 
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Joined: 15 Apr 2009 17:17
Posts: 8646
Location: Manchester
267.43

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98 S1W
00 M2
01 X1
03 P3
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 Post subject: Re: Drive belt
PostPosted: 30 Jul 2024 20:27 
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Joined: 07 Nov 2011 18:10
Posts: 4257
Current ride: Buell ulysses
Location: Telford
Maz wrote:
267.43

Hello :maz: could you have a look at box for date of manufacture? new or new old stock?
mines getting to be a few years old now 12+
so might order a replacement for peace of mind
many thanks
Barney

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 Post subject: Re: Drive belt
PostPosted: 31 Jul 2024 12:19 
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Joined: 15 Apr 2009 17:17
Posts: 8646
Location: Manchester
28.6.23

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Mithered ta death.
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96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR


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 Post subject: Re: Drive belt
PostPosted: 31 Jul 2024 12:21 
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Joined: 07 Nov 2011 18:10
Posts: 4257
Current ride: Buell ulysses
Location: Telford
thanks :maz: :yup:

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 Post subject: Re: Drive belt
PostPosted: 19 Aug 2024 15:22 
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Joined: 10 May 2019 23:31
Posts: 116
Current ride: XB12XT
Update - well the bargain eBay belt (£162) never arrived, so I got a full refund. "Courier lost it" - well the tracking number never worked, so I'm a bit suspicious despite the refund.

Anyway - back to the web, found the same Conti HB135-118 belt for £127 posted from "Spareto" online.
https://spareto.co.uk/products/contitech-timing-belt/hb135-118
Suspected it was a Euro supplier, although a .co.uk domain and all prices in Pounds.

Ordered it on 12th, arrived today (19th) via DHL Economy Delivery, from Estonia. Under £135 means no VAT or duty, so it came straight to me.

It is in a Continental box with a QR code to their website for product details which works, and is marked for HD Softail Deluxe 08/06-12/11 and Softail Convertible 01/09-12/11.
Install before 4/2028.

Image

The belt itself is marked as "Made in USA" with a date of 15042023, so I guess made last year, and a part number 523935937.

Image

Looks all good, and a major saving. Now letting it warm up before straightening it out - it's not kinked but has been in the Conti box a while (one assumes they choose the box and package it to avoid damage).

Once fitted I will update this thread (hopefully NOT from a roadside.....)


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 Post subject: Re: Drive belt
PostPosted: 23 Apr 2025 08:39 
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Joined: 18 Apr 2025 18:38
Posts: 6
Current ride: 2000 X1
Location: Cornwall
Please could someone steer me to an archive thread I once read about the various combinations of pulleys and relative ratios etc


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 Post subject: Re: Drive belt
PostPosted: 23 Apr 2025 09:18 
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Joined: 22 May 2009 18:43
Posts: 3306
Current ride: S1`s
Location: Llanelli South Wales
Full USA gearing 27 front 61 rear = 2.26 ratio
Euro front, Usa rear 29-61 = 2.1
Usa front, euro rear 27- 55 = 2.03
Full euro gearing 29 - 55 = 1.9 ( a pain in Welsh 20mph areas)

I use 29 front 61 rear


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 Post subject: Re: Drive belt
PostPosted: 23 Apr 2025 14:07 
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Joined: 06 May 2009 17:10
Posts: 2633
Current ride: 99 Cyclone M2
Location: Liverpool
I have some spare pulleys :yup:

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 Post subject: Re: Drive belt
PostPosted: 23 Apr 2025 20:34 
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Joined: 18 Apr 2025 18:38
Posts: 6
Current ride: 2000 X1
Location: Cornwall
Thanks guys, how does the 61 affect a standard euro spec belt?


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 Post subject: Re: Drive belt
PostPosted: 23 Apr 2025 22:32 
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Joined: 06 May 2009 17:10
Posts: 2633
Current ride: 99 Cyclone M2
Location: Liverpool
Only one belt size for tubers

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 Post subject: Re: Drive belt
PostPosted: 24 Apr 2025 19:26 
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Joined: 18 Apr 2025 18:38
Posts: 6
Current ride: 2000 X1
Location: Cornwall
gusm2 wrote:
Only one belt size for tubers

That answers that! :D
Thanks amigo


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 Post subject: Re: Drive belt
PostPosted: 26 Apr 2025 08:54 
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Joined: 18 Apr 2025 18:38
Posts: 6
Current ride: 2000 X1
Location: Cornwall
Found the post I was originally looking for :

Quote:
Lowering Gearing by changing Belt Sprockets

This text appeared as an article in "American Thunder" and was written by member Brian Marshall.

The UK/European Buell’s come with different gearing to the US Buell’s. The US Buell’s are geared for faster acceleration - the European models are geared for a higher top speed.

This is done by using different size final drive belt sprockets. US models have a 27 tooth engine sprocket (A) and a 61 tooth rear wheel sprocket (B). European models have a 29 tooth engine sprocket (A) and a 55 tooth rear wheel sprocket (B3).

PART NUMBERS:
A 29 TOOTH = 4020595
A 27 TOOTH = 40288-95
B 55 TOOTH = 37727-97Y
B 61 TOOTH = 34927-94Y

You can change the gearing on European Buell’s to be either full US spec gearing by changing both the engine and the rear wheel sprockets or half US spec gearing by just changing one of them.
There was an article in an issue of Battle 2Win magazine (Vol. 3, Issue 1) which gives a lot of data about different gear ratios so I’ve used some of that here and added a bit more information relevant to UK Buell owners.

The different combinations are:

A = 29 TOOTH B = 55 TOOTH
This is the "normal" UK spec and gives an overall gear ratio of 3.034.
Top gear - 24.02 mph/l000 rpm giving a theoretical top speed of 163 mph at 6800 rpm.
Fourth gear - 20.36 mph/1000 rpm - maximum speed 138 mph.
Third gear - 16.80 mph/1000 rpm - maximum speed 114 mph.
Second gear - 12.19 mph/l000 rpm - maximum speed 83 mph.
First gear - 8.93 mph/1000 rpm - maximum speed 61 mph.
At 80 mph in top gear the engine is running at 3300 rpm.

A = 27 TOOTH B = 61 TOOTH
This is the "full" US spec and gives an overall gear ratio of 3.615.
Top gear - 20.16 mph/l000 rpm giving a theoretical top speed of 137 mph at 6800 rpm.
Fourth gear - 17.08 mph/l000 rpm - maximum speed 116 mph.
Third gear - 14.10 mph/1000 rpm - maximum speed 96 mph.
Second gear - 10.23 mph/l000 rpm - maximum speed 70 mph.
First gear - 7.49 mph/l000 rpm - maximum speed 51 mph.
At 80 mph in top gear the engine is running at 4000 rpm.

A = 27 TOOTH B = 55 TOOTH
This is the US engine sprocket with the UK rear wheel sprocket to give an overall gear ratio of 3.259.
Top gear - 22.36 mph/l000 rpm giving a theoretical top speed of 152 mph at 6800 rpm.
Fourth gear - 18.95 mph/l000 rpm - maximum speed 129 mph.
Third gear - 15.64 mph/1000 rpm - maximum speed 106 mph.
Second gear - 11.35 mph/1000 rpm - maximum speed 77 mph.
First gear - 8.31 mph/l000 rpm - maximum speed 57 mph.
At 80 mph in top gear the engine is running at 3600 rpm.

A = 29 TOOTH B = 61 TOOTH
This is the UK engine sprocket with the US rear wheel sprocket to give an overall gear ratio of 3.366.
Top gear - 21.66 mph/l000 rpm giving a theoretical top speed of 147 mph at 6800 rpm.
Fourth gear - 18.36 mph/1000 rpm - maximum speed 125 mph.
Third gear - 15.15 mph/l000 rpm - maximum speed 103 mph.
Second gear - 11.00 mph/l000 rpm - maximum speed 75 mph.
First gear - 8.05 mph/l000 rpm - maximum speed 55 mph.
At 80 mph in top gear the engine is running at 3700 rpm.

I have a ‘99 M2 and I found the standard UK spec gearing too high. At motorway speeds of 70 - 80 mph the engine was running at 2900-3300 rpm in top and I often found I had to change down a gear to overtake briskly, especially if on an uphill section. It’s acceleration that gives me my kicks on a bike rather than the top speed. I need my licence for my job so I rarely go over 100 mph and have only pushed it towards the top speed on a very few occasions.

I decided to change the gearing to give me better acceleration so I changed the engine sprocket to a 27 tooth version, leaving the rear wheel sprocket at 55 tooth. This is a low cost option as the 27 tooth sprocket costs about £50 and is fairly easy to change. You don’t need to replace the belt because you are only changing from a total of 84 teeth (29+55) to 82 teeth (27+55) - 2 teeth less - but you do lose a lot of the adjustment on the belt. The rear axle is now almost at the end of the slots in the swinging arm with about l/2 inch left to go. This shouldn’t be a problem because these belts only stretch once during the first 500 miles and then stay the same length for the rest of their lives, so hopefully I won’t need to adjust it again. I don’t know if the original belt will work if you go to a full US 27-61 spec (4 teeth more) or the 29-61 option (6 teeth more). You’ll need to try it and see for yourself.

There are two minor problems with 1999 (and later) models when making the change to 27-55. Firstly the speedometer doesn’t read correctly. On post 1999 models the speedometer is electric and has a sensor in the gearbox. This sensor doesn’t know you’ve changed the overall gearing so the speedometer now reads about 7% fast. You can calculate how the speedometer will be affected by different sprockets - it changes by the same percentage as the overall gearing. In my case I changed the gearing from 3.034 to 3.259 - an increase of 7.4%. This isn’t too bad because at 30 mph the speedometer reads 32 mph, at 40 mph it reads 43 mph, at 70 mph it’s reading 75 mph, at 100 mph it’s reading 107 mph etc.

The second problem is that the belt is slightly closer to the swinging arm with the 27 tooth engine sprocket, so there is a very small mark where the belt occasionally rubs on the swinging arm when the rear suspension is at one extreme. This is not serious and I’ve done over 2000 miles with this gearing and no sign of any damage to the belt. I guess with full US gearing the larger rear sprocket keeps the belt away from the swinging arm so this doesn’t happen.

These two problems will not affect earlier models because the speedometer is mechanically driven from the front wheel and the swinging arm is not so thick. The result gives me just what I wanted. Acceleration is much better and the pickup from 80 mph in top is fantastic. I never have to drop a gear to overtake anymore because the motor is just at the ‘sweet spot’ at 3600 rpm and picks up a treat. It’s just like being in 4th gear instead of 5th. You don’t notice any loss in top speed because the bike is still geared to pull over 150 mph and it can easily run to speeds over 120 mph just by winding it on in top gear. The only downside is when cruising on the motorway at a steady speed, the engine is now revving a little higher which must adversely affect fuel consumption on long runs.

I’d definitely recommend this change - it’s low-ish cost and is a very easy way to gain a big increase in all round performance.

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