F3 RPM's @ 60 MPH in 6th gear

[larryd]

I would be interested in knowing what the engine RPM's are at 60 MPH in 6th gear on the F3 since they are geared 4 teeth lower on the rear sprocket???

My 2014 RTS shows 3100 rpm's @ 60 mph on the speedometer/58 mph on the GPS, in 6th gear...

Also my 2014 RTS shows 3650 @ 60 mph on the speedometer/58 mph on the GPS, in 5th gear...

I'm thinking, and sometime thinking scares me; But what if you could put a F3 rear sprocket and belt on the RT 1330?????? Would you have a touring rocket???? And at what fuel mileage costs???

larryd

 

[DrewNJ]

Why would they put a smaller rear sprocket on the f3? Aren't they already running almost to low of rpms on the 1330 machines as it is?? You'd think for a "hot rod" that theyd run a larger rear??

Or is the front different too??

 

[BikerDoc]

Wouldn't the rocket still be 160 lbs chubby?

 

[DrewNJ]

Not if you strip off all that useless luggage!

 

[DrewNJ]

Larry, while I bet it would physically bolt up, it will likely not play nice with the nanny...

 

[larryd]

Why would they put a smaller rear sprocket on the f3? Aren't they already running almost to low of rpms on the 1330 machines as it is?? You'd think for a "hot rod" that theyd run a larger rear??

Or is the front different too??

DrewNJ, its my understanding that they left the front sprocket the same size but they added 4 teeth to the rear sprocket making it larger and that made the final drive ratio LOWER...And they also needed a longer belt to accommodate the larger OD of the rear sprocket...

Yes the RT is heavier, but when you start lowering the final drive ratio it makes a noticeable difference in any vehicle...

PS, I'm just thinking outside the box...Possible possibilities...

 

[PMK]

Larry, FWIW, even myself was a bit misled by the wording in your first post. The words 4 teeth lower. Yes it's cool to alter gearing, whether up or down, your words made it sound as if they dropped 4 off the rear. No big deal.

I was surprised to hear they changed the rear. I have not been following the F3, but did hear it had a final ratio change. I was under the impression, but never cared to much, and thought they dropped a tooth or two from the front, keeping rotating weight lower, and using the same belt.

PK

 

[DrewNJ]

Well, that makes more sense. Thanks. I thought you meant lower as in less teeth (smaller sprocket) and thought that would be silly as it seems they really overgeared the 1330 machines already.

I don't know if 4 teeth gear changes would be enough to freak nanny out or not..

 

[retired1]

Larry, FWIW, even myself was a bit misled by the wording in your first post. The 4 words 4 teeth lower. Yes it's cool to alter gearing, whether up or down, your words made it sound as if they dropped 4 off the rear. No big deal.

I was surprised to hear they changed the rear. I have not been following the F3, but did hear it had a final ratio change. I was under the impression, but never cared to much, and thought they dropped a tooth or two from the front, keeping rotating weight lower, and using the same belt.

PK

I thought that I read in a post or heard on a video that they were using a longer belt on the F3.:dontknow:

 

[PMK]

I thought that I read in a post or heard on a video that they were using a longer belt on the F3.:dontknow:

If they added 4 teeth on the rear, the longer belt makes sense. As I mentioned, I am not really into or following the F3.

As for the 1330in the 14 RT, if you wind the throttle it runs, just needs more oomph at highway speeds.

PK

 

[spyderyderjim]

DrewNJ, its my understanding that they left the front sprocket the same size but they added 4 teeth to the rear sprocket making it larger and that made the final drive ratio LOWER...And they also needed a longer belt to accommodate the larger OD of the rear sprocket...

Yes the RT is heavier, but when you start lowering the final drive ratio it makes a noticeable difference in any vehicle...

PS, I'm just thinking outside the box...Possible possibilities...

Larryd,
Update:
The F3 belt is longer. F3 rear sprocket 89 teeth part# 705502216.
(RT rear sprocket 79 teeth part # 705502016).
F3 wheelbase is 67.3" and RT 67.5" (.2" shorter wheelbase on F3).

http://parts.spyder.brp.com/Index.a...iu3jqe2i0&catalog_id=0&language_id=1&siteid=1
BRP 2015 part# is available for rear drive belt on F3.
(Thanks Billybovine).
I like your thinking outside the box on 1330cc RT motor torque increase with 10 teeth larger F3 rear sprocket.
Lamont said 70 mph on F3 demo ride 6th gear was 4100 rpm; about same rpm 4100 as I had on my 2014 RT-S running in 5th gear!!
Took a ride Sunday on my 2014 Spyder RT-S SE6 and ran it in 5th gear 68 mph 4,100 rpm to check mpg & more hp, snap.
2014 RT-S in 5th gear at 4,100 rpm, (instead of 6th gear). (38.3 mpg for 115 miles).
Running in normal 6th gear I got 36.3 mpg at 3500 rpm for 101 miles 2.8 gals.
Hard to believe I got better mpg in 5th gear, plus quicker acceration!
Of course F3 will have more torque/hp all thru rpm range with larger rear sprocket.
I guess we all just need to buy a new 2015 F3 for performance.
Can't wait to hear Lamont's F3 performance increase when he puts on cat-delete bypass pipe/Akrapovic muffler!!
Jim

 

[billybovine]

The 2014s RT rear sprocket is 79 teeth. The F3 the rear sprocket is 89 teeth North America and 79 teeth for the rest of the world. That is according to the parts fiche.

 

[PMK]

The 2014s RT rear sprocket is 79 teeth. The F3 the rear sprocket is 89 teeth North America and 79 teeth for the rest of the world. That is according to the parts fiche.

I was looking at some other F3 items in the illustrated parts catalog for the F3 recently. I found it on the Can Am website.

PK

 

[DrewNJ]

So a 10 tooth difference? Wow! Sounds like they are actually trying to make use of that 6th gear. Good for them!

 

[billybovine]

From 79 to 89 that is an increase of sprocket size of 12.66% so the rpm should increase by the same. So 3,100 rpm at 60 will be about 3,500 rpm on a F3.

 

[Bob Denman]

Larryd,
I doubt if the F3 belt is longer. F3 wheelbase is 67.3" and RT 67.5" (.2" shorter wheelbase on F3).
That would be about right for the added 4 tooth larger rear sprocket on F3.
When part# are available for rear drive belt on F3 we will be able to comfirm same length belt as 2014 RT.

The belt has been reported as being two inches longer...
And the parts will bolt up on an RT; Nanny would never know the difference!

 

[billrob71]

There adding alot of teeth, that should make that thing fly off the line and the 6th gear and the added teeth should not effect the top speed.

Sounds like a nice combo

 

[billrob71]

The belt has been reported as being two inches longer...
And the parts will bolt up on an RT; Nanny would never know the difference!

With 10 extra teeth ,sounds little short unless the swing arm is alot shorter.

 

[DrewNJ]

The belt has been reported as being two inches longer...
And the parts will bolt up on an RT; Nanny would never know the difference!

Are you sure about that? Remember, the 1 tooth larger front sprockets don't play nice with the SE machines.

 

[larryd]

I would be interested in knowing what the engine RPM's are at 60 MPH in 6th gear on the F3 since they are geared 4 teeth lower on the rear sprocket???

My 2014 RTS shows 3100 rpm's @ 60 mph on the speedometer/58 mph on the GPS, in 6th gear...

Also my 2014 RTS shows 3650 @ 60 mph on the speedometer/58 mph on the GPS, in 5th gear...

I'm thinking, and sometime thinking scares me; But what if you could put a F3 rear sprocket and belt on the RT 1330?????? Would you have a touring rocket???? And at what fuel mileage costs???

larryd

Here is the post I remembered reading about the 4 tooth lower sprocket...

0-02-2014, 05:27 PM

#6​

sledmaster

Senior MemberJoin DateSep 2007LocationMinnesotaPosts192Post Thanks / Like

[h=2]

[/h]

The F3 is geared slightly lower with a 4-tooth larger rear sprocket and a drive belt that is 2" longer. The machine seems to run at 500 RPM higher for a given road speed. It squeaks the rear tire much easier, with a more aggressive drive-away characteristic. You can squak the rear tire in most any and every gear shift, as the bike is also 160 pounds lighter. But with the super broad torque band of the 1330, the exact shift points are really a moot point compared to a 990/991.
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