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[ltank]

Is there a list of belt sizes that Harley uses. Belt widths and tooth counts. There were so many changes with different models. Does anyone know the part numbers for a
65 tooth 1 1/8" pulley or a 70 tooth 1 1/8" pulley. lastly a Harley 1 1/8" 135 or 136 tooth belt? When doing custom work it makes for a big headache and lots of research.
Thanks Guys,
Ltank

[RayG]

It seems to be a simple enough issue that should have a number of possible solutions.  After my Falcon belt broke last July 4th just heading out for a weekend of riding I have since read everything I could plus contacted sprocket manufactures for choppers and customs for possible replacements.  Like many others I was looking for a Gates or better quality belt & sprocket combination would be available in wider widths to give us some extra insurance.  We all know the Tri-Glide solves the wider front sprocket but I was not successfull in locating a wider belt and rear sprocket combination.  I have been real carefull not to put to much strain on the belt and to be honest it defeated the original purpose for me which was to lower the gearing and have the low end grunt when getting on it.  There is a local guy that went to a chain drive on his 117" Hillside built Roadglide.  He has the dragster mentality and has gone through a number of belts in quick fashion.  I believe he broke 3 belts in one week of doing holeshots etc.  If the belt was located on the other side it would make life alot easier.

This belt topic has been beat to death with some interesting ideas, from swingarm modifications to a chain drive.  With all the problems that members from this site have discussed and solved it just seems that a better solution would have surfaced to improve the 30T mods.   

Apologies for the poor spelling, spell check is taking the day off today!

[timo482]

im sure it would be possible to have a pully machined.

to

[RayG]

Yes one can be machined but the cost quoted for my fitment was beyond what I would ever think of paying.  Wish I was a machinist at times. 

[ltank]

I was looking at the Gates site about different belts and pulleys. Here are some confusing info.  It has various drawings. Standard 14mm pulley vs HTD 14mm pulleys.
How do you know if you got the correct pulley to correct belt even if both are 14 mm?? I did not understand it. You guys take a look and maybe give me some insight.
When I see pulleys on line they dont say. Not even Andrews when I bout a 30 tooth pulley. FXR 5 speed and plan to run Sportster 68 tooth 1 1/8" pulley and 11/8" belt.
http://www.gates.com/brochure.cfm?brochure=3117&location_id=3881

WARNING: When designing belt drives for new applications with PowerGrip® GT®2 Power Ratings, do not use HTD® Sprocket Systems. HTD Sprockets/Bushings may not handle the increased torque loads and damage to the sprocket and/or bushing may occur. Only use PowerGrip GT2 Sprockets for new designs.

REPLACEMENT NOTE: When replacing an existing HTD belt running in an HTD Sprocket. Gates recommends PowerGrip HTD belts for 5 mm pitch sprockets and PowerGrip GT2 belts for 8 mm and 14mm pitch sprockets.

Ltank

[North Star]

I can't believe nobody has picked up the phone and called Gates to explain the issue that everyone has been discussing for months, and see what they have to say. I'd say ask what's the differences between the belt they mfg for HD, and the Poly Chain? I'd ask their opinion on why belts are breaking, albeit (possibly) from different manufacturers. And, see if they will sell directly any other versions they make that may be more suited to the pulley swap.

Before someone says, "why don't I?", I lost interest in doing this mod due to the fact I feel no performance mod is worth lowering the reliablity factor.

[ltank]

I emailed Gates and their reply was the following. from Mr. BRENT OMAN Manager Product Application Engineering

"The HD belts are Poly Chain belts, with a Carbon tensile member.  The Carbon used in the HD belts are different than in our standard industrial Poly Chain GT Carbon belts.
The HD belts are HTD tooth profile, as are the HD sprocket grooves. We don't carry any replacement line of motorcycle belts through Gates, and instead sell to that market entirely through Harley Davidson or any of the various aftermarket parts houses.
Hope this helps -  any questions, please let me know."

Seems to me that you should only use HD belts on HD pulleys that use the HTD tooth profile to be sure. Gates maked HD belts. HD belts can only be bought through HD,
Gates does make other belts for other copanies that can be used on Harleys but I don't know the compatability issues.

Ltank

[captdave221]

Well I have a falcon belt and I am do to receive a PC-139-1 139T-1 INCH WIDE 14MM POLYCHAIN BELT on Monday. I have a friend with a 120 motor running the Falcon ans it has not broke yet !!! I guess I'll try the PC-139-1 139T-1 INCH WIDE 14MM POLYCHAIN on my 120 and see which lasts the longest. i have a 2011 Ultra with a 120 and he has a 2010 Street Glide. Will post results as miles are acquired. LOL

[mcdonaldroadcapt]

I have 30,000 on the belt of my 2008 SE Ultra pushing two 225X65X15 tires on a trike conversion with no problems. Have always maintained proper adjustment per book.  Also, my 2000 Heritage Springer built to 95 CI has 40,000 miles on the belt and still in excellent shape.  I think that maintaining adjustment is the key.

[dayne66]

Had 45,000 miles on the '08 Ultra....before picking up a 3/8" x 1" bolt and having it embedded in the center of the belt. After starting to hear a ticking sound related to speed, drove another couple hundred kms to work and 1000kms home to my garage, where closer inspection revealed the issue. Replaced belt and dressed pullies...all was good 'til the day I traded it in.

[ltank]

Did the 3/8" x 1" bolt come loose from your Bike to cause this? Did you have a lower belt guard protecti ng the belt / pulley? Curious.
Ltank

[dayne66]

Bolt was not from bike....was a regular zinc bolt. All guards were in place. Just bad luck.