Pulley related question...
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Intermediate
Joined: Apr 2020
Posts: 45
Likes: 17
From: Near Ft. Bragg
Well, I went ahead and ordered an OEM pulley (66 T) to replace my broken pulley with because I just don't know enough at this point to make gearing modifications and I need to get my bike back on the road. I will continue to research this issue and talk to some local shops to see what they say. I would also appreciate any feedback from others who have changed pulley or primary pulley sizes and how that effected your ride/engine. I figure the advice to go with OEM configuration when in doubt is about the smartest advice I've gotten.
Thanks again all who commented.
Thanks again all who commented.
Outstanding HDF Member
Joined: May 2014
Posts: 2,400
Likes: 284
From: Fort Worth, TX
Good move, and if you want to lower your gearing doing so with a different compensator or motor sprocket would be the cheapest way to go, and easiest to reverse if so desired...
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
As I mentioned earlier, I have changed my 1990 bike from stock 32/61, to 32/70, which obviously required a new belt, then 30/70, which required another belt. Hence going 'big bang' is most economical on time and parts costs. I should have added that while my bike started out as an 80" Evo, it is now an S&S 107", so I've mixed and matched gearing to increased performance!
Tourer
Joined: Sep 2019
Posts: 430
Likes: 130
From: Harley ville
OSFG -so what year is your fatboy? is it a m8? 107? I will say that there is no lack of power in my 18 m8 deluxe, it will pull in 6th hard. course I have a stage one. tts tuner, S&E high flow air cleaner that retains factory air cleaner cover. and V&H competition baffles slip ons retains factory head pipes and hidden link pipe for exhaust scavenging, So it is very high torque stump pulling power, lost a very little with the removal of the converter mufflers, but gained it on the top cruise. I cruise at 92-94 @ mph @3100-3300 rpm ish. cruise set and two up at that. so at 55 mph it is a beast like 2100 rpms. It is a beast. It was a quiet cream puff prior to the upgrade. I had it done and dyno'ed a week after pint of sale, at the dealer and it was night and day. hope the information was able to give you a base line on what to compare it to. or to have a place to question others. the 103 twin cam is a good set up of a by gone era. That being said the 107 has just opened a larger window of operating range. , it also has dual balance shafts. to make riding at sustained speed enjoyable.
-Sorry to have gone off track. lol. but as the other posters said you would benefit from comensator pullly tooth count change. I know there was a huge difference in the early 2000 chopper craze due to the torque curve change in the operating ranges was a large reason they went open primary, in combination with the drive and driven pulley tooth changes. you could have a real torque monster good luck mate. keep us posted.
-Sorry to have gone off track. lol. but as the other posters said you would benefit from comensator pullly tooth count change. I know there was a huge difference in the early 2000 chopper craze due to the torque curve change in the operating ranges was a large reason they went open primary, in combination with the drive and driven pulley tooth changes. you could have a real torque monster good luck mate. keep us posted.
Last edited by 18deluxerider; Apr 12, 2020 at 10:13 AM.
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JimGnitecki
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