Templar X gas mileage

[Weresquatch]

Good news is no problem going home so....deus ex machina? Anyway, my X was purchased to be 80/20 but with the bias being off-road. I only want to travel on tarmac to get to dirt.

I appreciate the inputs on mileage. I'll just hit filling stations at 80 miles on the triometer and look at gas storage solutions for an extra gallon or so.

Right now my X is pushing 55mph at 7k. I'd like that number to be more like 62-65mph at 7k. What rear sprocket reductions do y'all recommend? I'm thinking 42t? I want to maintain as much off-road torque as I can but still not tax the motor too much on hwy sprints to trailheads especially when loaded down with some gear.

Thanks in advance.

[Thumper]

As I recall, OEM sprockets are 13/49 = 0.2653

If you go to a 47T rear, new ratio is 13/47 = 0.2766

% inrease in gear ratio can be calculated
0.2766 - 0.2653 = 0.0113

0.0113/0.2766 * 100 ~ 4.1% increase. So if it was going 60 before, it will go 62.4 with the new sprocket at the same rpm. Each gear will be affected exactly the same, by ~4.1% faster at any given rpm.

This is the way I calculate it. Please, anyone feel free to correct me if this is not mathematically correct.

So choose your target and then see what sprockets are available to make it happen. JT sprocket numbers are in the first post:
https://www.chinariders.net/showthread.php?t=32177

[Weresquatch]

When I broke out my gear inch calculator I found that going from 13/49 to 13/42 (a 7T drop) would yield about a 16.7% difference. In your example a 2t drop yielded about 4% so I think we're pretty close.

Assuming 54mph at 7K going to a 42T rear should yield about 63mph which is about where I was hoping to be. I appreciate you chiming in with your maths.

[J4Fun]

Originally Posted by Weresquatch

Good news is no problem going home so....deus ex machina? Anyway, my X was purchased to be 80/20 but with the bias being off-road. I only want to travel on tarmac to get to dirt.

I appreciate the inputs on mileage. I'll just hit filling stations at 80 miles on the triometer and look at gas storage solutions for an extra gallon or so.

Right now my X is pushing 55mph at 7k. I'd like that number to be more like 62-65mph at 7k. What rear sprocket reductions do y'all recommend? I'm thinking 42t? I want to maintain as much off-road torque as I can but still not tax the motor too much on hwy sprints to trailheads especially when loaded down with some gear.

Thanks in advance.

Just asking, you don’t have room to maybe go up 2 on the front rather than reduce the size of sprocket in the rear to achieve your lower rpm goal?

[Weresquatch]

Hadn't checked honestly. I'm just sussing out opinions before I do it. I would think there's room for a 2T change up front. That would necessitate a new chain maybe.

Just used a gear inch calculator instead of relying on my scribbling....Going from 49t in the rear to a 42t would yield 16.7% increase whereas running a 15/49 yields a 15.4% difference and probably needing 4 more chain links.

[Thumper]

Not sure there is room for a 15T front sprocket, but that would be a big change anyway(13T to 15T). I think 13 to 14 would be about a 7.6% increase, or 60 becomes ~64.5mph at same rpm, right?

[ProDigit]

Originally Posted by Thumper

Not sure there is room for a 15T front sprocket, but that would be a big change anyway(13T to 15T). I think 13 to 14 would be about a 7.6% increase, or 60 becomes ~64.5mph at same rpm, right?

2T isn't too big of a change.
On my X-Pro 150, I swapped out the front 15T for a 19T.
I still can wheelie in 1st(with pulling handlebars), but no longer in 2nd or 3rd.

It did lower rpm from 8.7k rpm at 55mph top speed, to 7.5k rpm at 60mph. Top speed increased, and rpm lowered to peak HP of the engine.