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Old 05-18-2013, 09:12 AM   #16
Harty
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Location: Devon, UK
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15 - 48 I run for greenlaning and even road work. I can cruise at 75mph and still do the Devon technical lanes.
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Old 05-18-2013, 10:21 AM   #17
rudk
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Quote:
Originally Posted by wiswoodsguy View Post
I absolutely love the 14/48 set up I'm running. Pulls hard everywhere, not jerky anywhere, fits my riding style perfectly
14/48 ??? That's very short. Do you ever ride on the street?
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Old 05-18-2013, 10:26 AM   #18
everetto
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Just went for a quick test spin with the 16T countershaft - big difference, it should be pretty good on the highway, but it definitely lost some of the peppiness.

Holy crap this thing can have some headshake at 75mph.....
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Old 05-18-2013, 10:35 AM   #19
Bill the Bong
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Quote:
Originally Posted by everetto View Post

Holy crap this thing can have some headshake at 75mph.....
Jip
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Old 05-18-2013, 11:38 AM   #20
The Letter J
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Location: Santa Maria, CA
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Quote:
Originally Posted by rudk View Post
14/48 ??? That's very short. Do you ever ride on the street?

I've run 14/48 on the street many times, even a few 300 mile days of 70/30 on/offroad and the 690 never complained even at speeds above the posted limit. I don't notice any difference in fuel economy, it just buzzes a bit more on the highway. I currently have 16/48 on the bike (same as stock 15/45) and really never see the need to gear taller as I am limited by how fast my riding partners are comfortable cruising (te250, drz400, te630.)

For strictly offroad use I would prefer a bit lower still and I think 14/50 will finally give the 690 a useful first gear in the tight stuff. I wouldn't want to cover any great distance with that gearing, but we do regularly truck our bikes to "the good stuff." I would have just run a 13 up front except that it forces the chain into the chain slider and would likely wear through in a day.
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Old 05-23-2013, 04:29 PM   #21
DirtJack
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Originally Posted by MrHix View Post
The chain guide doesn't interfere with the 48 rear?

Thanks,

MrHix
The rear mount of the guide has an offset which should be flipped for rear sprockets bigger than 45. Just loosen the rear bolt and press out the offset nut on the rear and flip it 180 degrees.
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Old 05-23-2013, 07:28 PM   #22
wiswoodsguy
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Quote:
Originally Posted by DirtJack View Post
The rear mount of the guide has an offset which should be flipped for rear sprockets bigger than 45. Just loosen the rear bolt and press out the offset nut on the rear and flip it 180 degrees.
Beat me too it

It was done before I bought the bike with 73 miles on the clock

It still rides great on the pavement. Slightly buzzier than the stock gearing, but I can still sit at 65+ all day and still feel my fingers after 150 miles. Where this gearing really shines is on tight trails - where my 520 really stood out, I can now ride my 690 with loads of confidence. I also have the Leo handlebar switch, which really enables this gearing to suit my riding style perfectly.

I rode some nasty single track last weekend on the 690, and was able to ride the same trail on my 250 smoker for comparison. I gotta say the I enjoyed both bikes for different reasons - but found them both very capable. The only hinderance I had was the weight of the 690 over the 250. Both bikes were great tractors
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Old 05-24-2013, 07:55 AM   #23
DirtJack
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Speeds at various RPM for 14/48 gearing
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Old 05-28-2013, 06:27 AM   #24
MrHix
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Quote:
Originally Posted by DirtJack View Post
The rear mount of the guide has an offset which should be flipped for rear sprockets bigger than 45. Just loosen the rear bolt and press out the offset nut on the rear and flip it 180 degrees.
Thanks, I didn't look for that!

Cheers,

MrHix
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Old 06-24-2013, 09:44 AM   #25
everetto
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Is there enough adjustment available to run the stock chain length with a 15/48 combo?
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Old 06-24-2013, 11:30 AM   #26
The Letter J
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It might be long enough, but I replaced the chain with a DID that was 2 links longer. I know that with my +2 chain that I can run 14/48, 15/48, 16/48. I have a new 50 mounted up on my spare sprocket carrier to try 14/50... the chain will still work with that combo but might not work with 15/50 and will not work with 16/50 (not that I'd run those combo's.)
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Old 06-24-2013, 11:40 AM   #27
DirtJack
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Originally Posted by The Letter J View Post
It might be long enough, but I replaced the chain with a DID that was 2 links longer. I know that with my +2 chain that I can run 14/48, 15/48, 16/48. I have a new 50 mounted up on my spare sprocket carrier to try 14/50... the chain will still work with that combo but might not work with 15/50 and will not work with 16/50 (not that I'd run those combo's.)
What was the total chain length you used? 120 rather than 118?
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Old 06-24-2013, 12:13 PM   #28
The Letter J
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I'm almost positive that I used 118 links, as I always buy a 120 and cut the excess off to keep as a trail spare.
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Old 06-27-2013, 10:39 AM   #29
The Letter J
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Location: Santa Maria, CA
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I verified yesterday that the chain I have on (2 links longer than stock) works with 15/50. In theory, that would lead me to believe that 15/48 would work on the stock chain (2 less teeth, 2 less links.)

I did a little running around with 14/50 last night and I can now stand the bike up in fourth gear up to ~70mph but find the rev limiter in sixth somewhere around 90 (on a closed course, of course! )

Starting to feel like an MX bike having to shift so fast! I can be in sixth without feeling like it's gonna stall by 45mph, 70mph is roughly 6000rpm now.

Edit: It was eating me up not knowing how long the chain was so I went to the garage and counted 116links, so stock was 114.
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The Letter J screwed with this post 06-27-2013 at 06:33 PM Reason: chain length
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Old 06-29-2013, 11:12 AM   #30
DirtJack
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Quote:
Originally Posted by The Letter J View Post
I verified yesterday that the chain I have on (2 links longer than stock) works with 15/50. In theory, that would lead me to believe that 15/48 would work on the stock chain (2 less teeth, 2 less links.)

I did a little running around with 14/50 last night and I can now stand the bike up in fourth gear up to ~70mph but find the rev limiter in sixth somewhere around 90 (on a closed course, of course! )

Starting to feel like an MX bike having to shift so fast! I can be in sixth without feeling like it's gonna stall by 45mph, 70mph is roughly 6000rpm now.

Edit: It was eating me up not knowing how long the chain was so I went to the garage and counted 116links, so stock was 114.
Yea, I counted too -- 114 links. Your estimate of 70 being 6K rpm is actually rather accurate:

690 14/50 gearing.
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DirtJack screwed with this post 06-29-2013 at 11:17 AM
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