24 tooth front drive sprocket

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Re: 24 tooth front drive sprocket

Postby Fullauto » Sun Feb 13, 2011 4:22 am

Commando75 wrote:On my MK 3 I went from a standard front sprocket to a 22 tooth unit. It was like a different machine. Changing the front sprocket by one or two teeth will have a dramatic effect on how the bike goes down the road. I am very happy with the 22 tooth unit (did a 1500 mile trip this summer) and I would not reccomend anything bigger. 3800 RPM produces a relaxed 65-70 mph all day long. The only down side is that you might get a little sleepy as you glide down the freeway!


22 tooth was standard for the MK3. 21 for the 850s pre MK3. 23 tooth is maximum practical without engine mods and 3500 revs is 70mph.

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Re: 24 tooth front drive sprocket

Postby mikegray660 » Sun Feb 13, 2011 4:43 am

i think what we can surmise from this thread is that most people on this forum don't like having a lot of teeth........
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Re: 24 tooth front drive sprocket

Postby cjandme » Sun Feb 13, 2011 10:13 am

Getting the bike running is certainly first on my list ... I was just wondering if a 24t counter sprocket would physically fit in the space or if it was too tall and would make the chain rub on the chain guard that is cast into the backside of the inner primary case. Good to know about checking the bearing on the layshaft before making a counter sprocket switch though. Also nice to hear what everybody thinks about the ratio they are using. I was going to ask about the 530 chain versus a 520 o-ring or x-ring chain, but it i think that's kind of covered in the 100 dollar chain thread, By the way Russ, what kind of oil are you using? Just kidding....anyway I'm working on getting some photos posted, but I guess my main hobby is really my 6 kids (oldest one is eight- so lots of commotion going on at my house). Thanks again to all who took the time to reply
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Re: 24 tooth front drive sprocket

Postby hobot » Sun Feb 13, 2011 10:38 am

Hm 24 might not clear primary case lip. Might call a vendor and ask for a OD measure. Old Brits Fred might know right off the bat. Commando have torque enough to pull 24T just fine in normal traffic just not leave em behind at a light as strain free, but a down shift to 2nd as 55-60 mph would be fine passing gear pull.
With 20 and 21T on responsive Combat I often found myself trying to snick 5th over drive just to stay legal speed climbing the steepest places in Ozark carrying a couple beer cases on back, because the rush by suck little throttle increases was too sensitive to stay carefree. On the lower gear in city traffic you must be relaxed on throttle not to just bark out ahead like police bait.

The main down side of 520 chain is the teeth wear rahter faster d/t being significantly thinner. I've done 520 lighter conversion on a Combat and a SV650 and worked at treat, just detectable in better response but after a few front sprockets and a couple read drums used up in a couple rear tire changes on each bike I have sworn off 520. 530 X-ring, not O-ring Obsolete Stiff chain, just does clear in some and the others it eats a clear path in a few miles w/o any real damage but cosmetic when you ever you expose the sprocket.
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Re: 24 tooth front drive sprocket

Postby Gino Rondelli » Sun Feb 13, 2011 11:14 am

23T is my favourite for touring but I have to say on my most used Commando it also has a belt drive which ups the gearing a bit also, I think you'd find a 24 a bit of a PITA on anything but highways, motorways whatever you call them. Running 22 on my Fastback and my roadster, I feel the motor is a bit buzzy for sustained 75 - 80 mph cruising with the 22 but great all round apart from that on what we call A or B roads, I'm lucky to have a Commando for almost any occasion but when I only had one and it was used for everything from going to work and holidays I ran a 23.

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Re: 24 tooth front drive sprocket

Postby marinecommando » Sun Feb 13, 2011 1:39 pm

I managed to pick up a 29 tooth triplex primary cog for my 72 combat. That paired with a 19 gives me everything I need. Great acc round town and effortless cruising, 70mph at 4k. That's speedo speed. :D
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Re: 24 tooth front drive sprocket

Postby rvich » Sun Feb 13, 2011 2:29 pm

marinecommando wrote:I managed to pick up a 29 tooth triplex primary cog for my 72 combat. That paired with a 19 gives me everything I need. Great acc round town and effortless cruising, 70mph at 4k. That's speedo speed. :D


Did that require a different chain or is there enough adjustment to accomodate that change?
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Re: 24 tooth front drive sprocket

Postby marinecommando » Sun Feb 13, 2011 2:34 pm

There was enough adjustment to take the larger sprocket...
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Re: 24 tooth front drive sprocket

Postby cjandme » Fri Feb 18, 2011 9:05 pm

thanks again, I'm wanting to switch over to a primary belt drive at some point, the previous owner removed the electric starter, which i have in a box of parts (would probably convert to 4 brush if i used it),anyway just need to $$$ for that stuff later. Cj
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