Phazer Gearing

[Srxspec]

Per testing and seeing specs on the Phazer, Phazer FX, Phazer GT, and Phazer Mtn Lite someone had asked about gearing on these sleds.

Phazer & Phazer FX:
-Gearing: 18-41 (2.28:1)
-MPH: 81 MPH @ 11,100 engine RPM

Phazer GT:
-Gearing : 20-41 (2.05:1)
-MPH: 90 MPH @ 11,100 engine RPM

Phazer Mountain Lite:
-Gearing: 17-41 (2.41:1)
-MPH: 68 MPH @ 11,100 engine RPM

Also remember when calculating MPH that it is based off of clutch RPM and not engine RPM when using a motor with gear reduction from the crank to the pto shaft (clutch). The Phazer has a 30% reduction from the crankshaft to pto shaft. Example: 11,100 engine rpm = 7770 clutch rpm

***All MPH is based on calculations and how fast the sled can go before the clutches shift to the point of locking up and no longer shifting out.***

Add 11% to MPH numbers and you will see speedo indicated speed.

I am in no way, shape, or form saying this is how fast your Phazer will go. I am simply supplying the information that with enough HP how fast your Phazer could go with it's factory gearing.

 

[ptrudel]

crazy..thanks for the info

 

[BV1]

11%... woah. How you figure?

-Steve

 

[Srxspec]

Dynojet track dyno is accurate MPH reading. Apex, RX-1, Vector, and Phazer all show 11% higher on speedo than actual speed. Port-a-tree timing system with MPH sensor as well shows the same results. Speedo is off about 11%.

 

[BV1]

Wow, so when Jeff ran that 91.85 MPH at that track was reading like 100 on the speedo? Crazy.

Good info,

-Steve

 

[yamy07]

Sxrspec wrote

Also remember when calculating MPH that it is based off of clutch RPM and not engine RPM when using a motor with gear reduction from the crank to the pto shaft (clutch). The Phazer has a 27% reduction from the crankshaft to pto shaft. Example: 11,100 engine rpm = 8100 clutch rpm

I believe the gear reduction is actually 50/35 or 30%. Example 11,100 engine rpm = 7700 clutch rpm. So you need to reduce your calculated speeds accordingly.
Also the Mnt Phazer has 8 tooth drivers.
With these in mind - Phazer Mt Lite -MPH: 62MPH @ 11,100 engine RPM

 

[Srxspec]

yamy07, updated the above post. For some reason I had it stuck in my head that it was a 27% reduction. Oops! You can take 10% away from the above MPH calculations and get the 1:1 clutch ratios (most efficient areas of the clutch to be in).

 

[Srxspec]

Interactive gearing chart.....lets see if it works.

http://www.ty4stroke.com/viewtopic.php?t=33188

 

[Superman]

Great information guys. Thank You. So My Mtn. Lite with 19/41 low altitude gearing could see approx. 70 mph actual, and 77-78 on the speedo? If so that is right where My seat of the pants feeling was when I rode mine last weekend. I guess I can live with that.

 

[Roswell]

So a Phazer will go 73mph at full shift out?

 

[teerex]

So would it then be a smart or neccessary mod to change the FX to 20 tooth upper with a 140-150 HP turbo kit, including the new Freeride 136"x1,5" track ?

Or maybe even 22 or 23 tooth if possible ? That would give 1.86 or 1.78 ratio and close to the "magic" 100 MPH real world speed mark. Who would like to go faster than 100 with a long track FX anyway ?

My 98' MachZ with 136"x1,5" track was geared for approx 110 MPH but rarely was driven past 100 MPH. At about the same power but 120 lbs lighter, I can imagine the FX turbo beeing a rocket

 

[teerex]

Does the FX have 9-tooth drivers, and is there room for 10-tooth no-slip with a 1,5" track ?

 

[teerex]

This is why the Phazer is lightweight

 

[RollRite]

If you change the sprocket do you need to change the clutching.

 

[phazerfly]

Hey Teerex I got to ask, are you at all worried about that little gear when you put the turbo to it? There just doesn't seem like a lot of meat to those gears IMO.