+2 on the rear sprocket!? - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 7 (permalink) Old 02-28-2016, 02:42 PM Thread Starter
Grand Prix 125
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+2 on the rear sprocket!?

My mechanic asked me what chain I want when I replace it, I asked about going down one and up 2 on the rear. Will this wheelie all the time when I crack it open in 1st and second? I know how to wheelie it in 1st, and you have to intentionally crack the throttle I find, but I can still open it wide and fast without popping the front up.

How will this be, any advice? Thanks!
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post #2 of 7 (permalink) Old 02-28-2016, 02:51 PM
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what year bike?

Models 13+ have a very neutered first as compared with 12 and older so no power wheelies in first with stock gearing even if you try. I have a 14 and I am -1 froont +3 rear, and it will only lift front tire if you absolutely smack the throttle open. When I take off from a stop and I accelerate hard but not smack it it will not wheelie.

Now my understanding is that on a 12 and earlier first is so short that it will try to wheelie with stock gearing. If you go -1/+2 I bet it will be brutal, but just a guess.
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post #3 of 7 (permalink) Old 02-28-2016, 02:58 PM Thread Starter
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I have a 2011. My friend knows someone who had this done and said it wheelies all the time. I'm a little concerned as we all like to crack it open, and I don't want to have unexpected wheelies all the time. I can't do it in second though, it just won't do it. Will this make it pop up in second?
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post #4 of 7 (permalink) Old 02-28-2016, 03:36 PM
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Quote:
Originally Posted by PhilUK View Post
I have a 2011. My friend knows someone who had this done and said it wheelies all the time. I'm a little concerned as we all like to crack it open, and I don't want to have unexpected wheelies all the time. I can't do it in second though, it just won't do it. Will this make it pop up in second?
On throttle only , if I have to guess, probably not. But drop the clutch in second just the right way and it sure will.
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post #5 of 7 (permalink) Old 02-28-2016, 06:58 PM Thread Starter
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Yea, I'll have to try it really. I'll have a talk with him about it.

Thanks.
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post #6 of 7 (permalink) Old 02-28-2016, 07:05 PM
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That's not a huge change... it won't turn into an uncontrollable wheelie monster, you'll just notice better acceleration everywhere, and a slightly lower top end. If you spend a lot of time on the highway, revs will be a little higher there.

It takes a lot to make a bike into a wheelie monster- most dedicated stunt bikes are running 60+ tooth rear sprockets.
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post #7 of 7 (permalink) Old 03-03-2016, 05:08 PM
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Don't forget the speedo will be out with that gearing as well
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