New Timing Belts and tensioning

discussions specific to the 907IE
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arp489j
Posts: 39
Joined: Sun Oct 30, 2016 9:05 pm
model: 907 I.E.
year: 1993
Location: UK

New Timing Belts and tensioning

Post by arp489j »

Recommendations please for supplier of good quality timing belts. Also, do they have a date stamp either on the packaging or belts themselves? There are a number of posts on this and other forums comparing prices and quality of belts from Ducati, Gates, Dayco, Flennor etc. Gates make most if not all belts for Ducati but apparently a Gates belt is a different construction to a Ducati belt made by Gates for Ducati???

73740021A is the original part number, also for the ST2 etc. but has this been superseded? Belt tensioning is covered elsewhere but it would be good to know peoples preferences for:
1. 5mm Allen key method
2. Spring balance method 10Lb ?
3. Frequency method - 110Hz ?

Thanks for any help or advice...

Also looking for a supplier of the M1R fork seals
RB

1980 LAVERDA JOTA
1982 HESKETH V1000
1985 LAVERDA SFC 1000
1993 DUCATI 907IE sold May 2017
1993 DUCATI 907IE sold September 2017
1995 TRIUMPH DAYTONA SUPER III
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Revhead
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Re: New Timing Belts and tensioning

Post by Revhead »

Hi there,

I don't have a lot of info on the belt apart from me preferring the frequency method as I believe it's most accurate.

With regards to the M1R seals (and other parts in the forks like bushes and dustcovers), they are the same as BMW K100 (16V) and K1100 parts. All numbers you need are in this post http://forums.ducatipaso.org/viewtopic.php?f=3&t=3889

Cheers,
Bas
If it ain't broke, don't fix it. Modify it!
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paso750
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Re: New Timing Belts and tensioning

Post by paso750 »

Fork seals are Ariete ARI.083.

The 5mm allen key method is often used and mentioned in different forums but noone can actually tell its origin. Imho it`s from the 4V guys as it results in a much higher tension. If you`d want to end up with ca 110Hz it would be the '8mm allen key method'. However the frequency method is simple and precise. The spring balance method will only work if the engine is out of the frame as there`s no way to use that on the rear cylinder.
The new belt number is 73710081A before it was 73740021A and 73710011A.

If the belts are replaced on regular basis I doubt you`ll notice any difference in quality.
arp489j
Posts: 39
Joined: Sun Oct 30, 2016 9:05 pm
model: 907 I.E.
year: 1993
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Re: New Timing Belts and tensioning

Post by arp489j »

paso750 wrote:Fork seals are Ariete ARI.083.

The 5mm allen key method is often used and mentioned in different forums but noone can actually tell its origin. Imho it`s from the 4V guys as it results in a much higher tension. If you`d want to end up with ca 110Hz it would be the '8mm allen key method'. However the frequency method is simple and precise. The spring balance method will only work if the engine is out of the frame as there`s no way to use that on the rear cylinder.
The new belt number is 73710081A before it was 73740021A and 73710011A.

If the belts are replaced on regular basis I doubt you`ll notice any difference in quality.
Many thanks. The belts were last replaced for the previous owner in 2010 at 1,997 miles. It has done 2 miles since then!
RB

1980 LAVERDA JOTA
1982 HESKETH V1000
1985 LAVERDA SFC 1000
1993 DUCATI 907IE sold May 2017
1993 DUCATI 907IE sold September 2017
1995 TRIUMPH DAYTONA SUPER III
unclezip
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Re: New Timing Belts and tensioning

Post by unclezip »

I just replaced mine with Dayco....used the 5 mm allen method...seemed to work fine....I think I was over thinking before I dove in......
I took off Ducati belts, no idea how old they were...looked well used....no cracks or unusual wear in the teeth,or anywhere else...
Only took a couple hours or so....well worth the insurance in my opinion......
92 907 i.e.
2016 F6B
2001 MG Jackal
1980 XS Eleven/1960 Watsonian sidecar
1974 Norton Commando/Factory Production Race
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higgy
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Re: New Timing Belts and tensioning

Post by higgy »

5mm works just fine, Hz is no more accurate. Both require the same care in checking and putting the slack in the correct position, Hz just cost you more bucks. It aint no piano, jeez
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
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92 907ie
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paso750
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Re: New Timing Belts and tensioning

Post by paso750 »

it`s a lot more accurate (if you`re using a proper microphone). Of course the 5mm allen key method works as will a higher or lower belt tension. It`s a bit like tire pressure.
However the 'we`ve always done it this way and it works' doesn`t change the fact that if you`d want to respect Ducatis belt tension specs the tension resulting from the 5mm allen key method is too high.
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MarkST
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Re: New Timing Belts and tensioning

Post by MarkST »

. .
Last edited by MarkST on Sun Jan 22, 2017 11:21 am, edited 1 time in total.
2004 ST4S
2001 ST4
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Derek
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Re: New Timing Belts and tensioning

Post by Derek »

For tensioning belts I use Gates Carbon Drive app on my phone http://www.gatescarbondrive.com/products/tools
1994 907ie
2017 Supersport 939
2015 Scrambler Classic
1982 Pantah 500SL (now sold)


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arp489j
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Re: New Timing Belts and tensioning

Post by arp489j »

Derek wrote:For tensioning belts I use Gates Carbon Drive app on my phone http://www.gatescarbondrive.com/products/tools
Good for IPHONE and ANDROID. Not Windows Phone...
RB

1980 LAVERDA JOTA
1982 HESKETH V1000
1985 LAVERDA SFC 1000
1993 DUCATI 907IE sold May 2017
1993 DUCATI 907IE sold September 2017
1995 TRIUMPH DAYTONA SUPER III
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Derek
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Re: New Timing Belts and tensioning

Post by Derek »

arp489j wrote:
Derek wrote:For tensioning belts I use Gates Carbon Drive app on my phone http://www.gatescarbondrive.com/products/tools
Good for IPHONE and ANDROID. Not Windows Phone...
But who would want a Windows phone? :lol: ;)
1994 907ie
2017 Supersport 939
2015 Scrambler Classic
1982 Pantah 500SL (now sold)


Scotland
arp489j
Posts: 39
Joined: Sun Oct 30, 2016 9:05 pm
model: 907 I.E.
year: 1993
Location: UK

Re: New Timing Belts and tensioning

Post by arp489j »

Derek wrote:
arp489j wrote:
Derek wrote:For tensioning belts I use Gates Carbon Drive app on my phone http://www.gatescarbondrive.com/products/tools
Good for IPHONE and ANDROID. Not Windows Phone...
But who would want a Windows phone? :lol: ;)
:) :) :) It was a big mistake and only because I "upgraded" from my trusty 6310i just last year! Now that was a brilliant phone and still is. Also not much use for cam belt tensioning though...
RB

1980 LAVERDA JOTA
1982 HESKETH V1000
1985 LAVERDA SFC 1000
1993 DUCATI 907IE sold May 2017
1993 DUCATI 907IE sold September 2017
1995 TRIUMPH DAYTONA SUPER III
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MarkST
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Joined: Mon Dec 15, 2014 11:05 am
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Re: New Timing Belts and tensioning

Post by MarkST »

. .
2004 ST4S
2001 ST4
1987 Paso 750
ducatiderek
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Re: New Timing Belts and tensioning

Post by ducatiderek »

I was told by an " expert " that it also depends on the garage/workshop temperature ! so in the cold weather/workshop temp. is lower I use the 8mm gauge as the engine would be less expanded than in the warm weather [ UK !! ] when I use the 5mm gauge , as others have said it has worked for me 20 yrs.
*MB
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Re: New Timing Belts and tensioning

Post by *MB »

For belt tensioning I have used a similar (free) application from ContiTech called Tension2Go: https://play.google.com/store/apps/deta ... n2Go&hl=en

Verified the accuracy using a calibrated SKF tuning fork, and recorded the exact Hz using a Galaxy S2...

Cheers,
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