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Old 05-04-2011, 07:28 PM   #91
tjrockit
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Originally Posted by beechum1 View Post
awesome, thanks for the update. Looks like we have two options then gentlemen, pay more for faster, or less for slower, as it always seems to be. Do we have anyone that's ready to do this now? perhaps we can do one now, and one later.....
I'm up for the slower and cheaper option and can do it now if you like.
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Old 05-09-2011, 05:27 AM   #92
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I put both my 2nd and 5th gears in over the weekend. It works great thanks again guys for all the good info.
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Old 05-09-2011, 05:40 AM   #93
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Originally Posted by D0T-C0M View Post
I put both my 2nd and 5th gears in over the weekend. It works great thanks again guys for all the good info.
What sprocket ratio are you running? 15/45, 14/48???

I'd be interested to hear how you gas mileage changes.
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Old 05-09-2011, 06:12 AM   #94
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Originally Posted by tjrockit View Post
What sprocket ratio are you running? 15/45, 14/48???

I'd be interested to hear how you gas mileage changes.
I have been testing with my 15/45 setup so far because I'm waiting for my new teraflex tire to come in before taking the rear wheel off to change it and put my 48T sprocket on. The shifting between 1st and 2nd is much improved with the gap between them reduced. Now lifting the front in first and shifting into second is stronger and downshifting is smoother. The 5th gear on the other hand is too low for the 45T at normal highway speeds. The 48T will most definitely help, maybe even a 50T for those that are more off road oriented. I do not foresee any changes in gas mileage because with the new 5th gear and the 48T sprocket has the same final drivetrain ratio as the old 5th with the 45T sprocket. I performed this mod so that I could run a larger rear sprocket while still allowing the bike to run on the highway without the engine screaming out of the frame.

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Old 05-09-2011, 09:12 PM   #95
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I have been testing with my 15/45 setup so far because I'm waiting for my new teraflex tire to come in before taking the rear wheel off to change it and put my 48T sprocket on. The shifting between 1st and 2nd is much improved with the gap between them reduced. Now lifting the front in first and shifting into second is stronger and downshifting is smoother. The 5th gear on the other hand is too low for the 45T at normal highway speeds. The 48T will most definitely help, maybe even a 50T for those that are more off road oriented. I do not foresee any changes in gas mileage because with the new 5th gear and the 48T sprocket has the same final drivetrain ratio as the old 5th with the 45T sprocket. I performed this mod so that I could run a larger rear sprocket while still allowing the bike to run on the highway without the engine screaming out of the frame.
What do you normally run at highway speed, 55 or 65 mph (or more )? When you say it's too low, does it sound like the engine is lugging a bit?
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Old 05-10-2011, 03:08 AM   #96
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What do you normally run at highway speed, 55 or 65 mph (or more )? When you say it's too low, does it sound like the engine is lugging a bit?
Well secondary roads are normally 45-50 mph while highway speeds are 60mph. At 50mph in 5th I find the motor lugs. At 60-65mph its not bad and if I were using my bike mostly on the road wouldn't be too bad but I use my bike mostly off road and would rather have good low end torque instead of top speed. Also I weigh 260lbs so maybe a lighter rider might find the stock gearing more to their liking.

I installed my new teraflex tire on last night and slapped on my 49T sprocket. Its quite funny because I could have put my hand in fire that I had a 48T but stamped on it is a 49T. I think it will be perfect but couldn't try it out last night because it was pouring rain. The teraflex tire stands a good 1-1/2" taller than my kenda 4.50 tire.

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Old 05-13-2011, 01:37 PM   #97
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gap

DOT-COM......
what is the gap from 4th to 5th like? would the motor pull from 60mph. i put a 140/80-18 and the taller tire has the same effect as the 5th gear. i can,t use 5th until 65mph because the motor wont pull it.
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Old 05-13-2011, 02:18 PM   #98
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DOT-COM......
what is the gap from 4th to 5th like? would the motor pull from 60mph. i put a 140/80-18 and the taller tire has the same effect as the 5th gear. i can,t use 5th until 65mph because the motor wont pull it.
I was out on a 75 mile run today and I think I'm gonna have to agree with you. I was running 15/49 and I think I'm gonna drop the front sprocket to 14T because the engine only starts to breathe around 65mph. I think I'll put the 15T sprocket only for long high speed drives but to play around locally 14T/49T is a very nice setup. Front sprocket is a breeze to change. If your running the 15T/45T gearing you'll really want to change to at least 15T/49T
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Old 05-13-2011, 04:35 PM   #99
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NX650 5th Gear

Is the consensus that the NX 5th gear is to tall for 15/45 gearing?
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Old 05-14-2011, 07:24 AM   #100
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Is the consensus that the NX 5th gear is to tall for 15/45 gearing?
It's too bad that the XRL doesn't show RPM's. It would be great to know what the RPM's are with the new 5th gear and a 15/45 setup. I was hoping to run a 15/45 setup for when I'm commuting or on a long haul that requires slabbing it until you get to the dirt.
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Old 05-14-2011, 07:42 AM   #101
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It's too bad that the XRL doesn't show RPM's. It would be great to know what the RPM's are with the new 5th gear and a 15/45 setup. I was hoping to run a 15/45 setup for when I'm commuting or on a long haul that requires slabbing it until you get to the dirt.
I have a digital vapor dash that shows RPM, I am running 15T/49T gearing right now. I can give you RPM readings if you want. What speeds do you want RPM for? I am not interested in putting the 45T rear but I don't mind giving you RPM for the gearing I am running. I have a 14T front sprocket due in on Monday so I will be running that next week.

As far as the consensus on the 5th gear being too large on stock gearing I would completely agree. Its my opinion that the original 5th gear and stock gearing is good for people that run the pavement most of the time. Putting a 5th gear with one tooth less equals to driving the stock 5th gear with a 42T rear sprocket which lowers the RPM too much IMO. The 15T/49T I run is great for pavement riding but out in the trail I think the 14T/49T will be bang on, although running the 49T already has helped 1st to 4th quite a bit.
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Old 05-14-2011, 08:51 AM   #102
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I just went out for a spin and at 100km/hr or 62mph the engine is turning 4300RPM with NX650's 5th gear and running 15T/49T sprockets.
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Old 05-14-2011, 11:36 AM   #103
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gap

what is the gap from 4th to 5th like. with the bigger tire its a big gap. my plan is to run 15/48 in the thought that 5th would be close to stock gearing. im looking to lower my first 4 gears while still being able to ride up to 70 or so on the hwy.


steve...... if he motor had a few more ponys like yours it might work. i am building a second motor that will have the new 5th gear in it and i believe that the built motor will be able to pull the lower rpms at freeway speeds.. what size is your back tire and gearing now?
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Old 05-14-2011, 06:21 PM   #104
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Originally Posted by D0T-C0M View Post
As far as the consensus on the 5th gear being too large on stock gearing I would completely agree. Its my opinion that the original 5th gear and stock gearing is good for people that run the pavement most of the time.
Hmm... If that is the case, then maybe I'll focus on installing the XR600 1st gear and the NX650 2nd gear since what I really want to the gearing for off road in first and second that I get from running a 14/48T sprocket but still want the highway speeds for traveling back and forth to the trail head.
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Old 05-14-2011, 07:36 PM   #105
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Originally Posted by tjrockit View Post
Hmm... If that is the case, then maybe I'll focus on installing the XR600 1st gear and the NX650 2nd gear since what I really want to the gearing for off road in first and second that I get from running a 14/48T sprocket but still want the highway speeds for traveling back and forth to the trail head.
Well I think switching to 14T/49T help all gears from 1st to 4th and by putting the NX650 5th it will make your machine driveable on the highway.

The gap between 4th and 5th is more pronounced but still quite smooth. I think the 14T/49T is going to be bang on. I will report back my findings.
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