Need favor from a Gen 2/3'er with GPS

[SkooterG]

If you just want to lower the RPM in top and you are otherwise happy with you gen 1 have you considered fitting a gen 2 hub and then using a speedo healer to get the correct speed displayed. It looks like the gen 2 hub would bolt straight on (unless someone knows different)and as its the reason why the gen 2 is a little more relaxed it should give you what you want. Its something I'm actively considering at the moment but haven't tried yet.

Also, while I am not positive about this, I think you can do a conversion to the gearing from the old Yamaha Venture. The old Venture, the original V-Max, and the FJR all share the same final drive.

 

[HJHFJR]

If you just want to lower the RPM in top and you are otherwise happy with you gen 1 have you considered fitting a gen 2 hub and then using a speedo healer to get the correct speed displayed. It looks like the gen 2 hub would bolt straight on (unless someone knows different)and as its the reason why the gen 2 is a little more relaxed it should give you what you want. Its something I'm actively considering at the moment but haven't tried yet.

edit; been doing a fair bit of reading and despite what I first thought it would appear that the ratios in the two hubs are the same so no gain there. Can anyone confirm this ?

The ratio's in the Gen1 and Gen2 hubs are the same at 33/9 or 3.667 to 1

THe different gearing is internal in the engine in the primary and secondary gears

Primary Gen1 is 74/48 Primary Gen2 is 75/48

Secondary Gen1 is (35/36)(21/27) Secondary Gen2 (35/37)(21/27)

The gear ratios, 1st to 5th are the same for Gen1 and Gen 2

 

[wfooshee]

I found BugR's thread from 2007, and it seems he never got it done. He had a Venture pumpkin with a taller gear, but several things were different, including the studs that attache the pumpkin to the swingarm, and the axle bushings and spacers were different. I didn't find anything where this was successfully completed on an FJR.

In that thread, however, was a mention of a company that will put the venture gears into an FJR pumpkin, making it a direct swap, but I haven't found where anybody did that.

 

[Chiefblueman]

Sounds like a lot of work and expense for very little return.

 

[CopB8]

Yah, I'm not seeing any of this pumpkin chang'n stuff happening. :huh:

I'm just shoring up my internal rationalization for why I'm going to sell my perfect condition 9 year old motorcycle for a brand new shiny one that's not a quantum leap over the old

one.

But I just can't help myself.

 

[Roy Epperson]

I'm just shoring up my internal rationalization for why I'm going to sell my perfect condition 9 year old motorcycle for a brand new shiny one that's not a quantum leap over the old

one.

But I just can't help myself.

And your supporting the economy!!!

 

[Chiefblueman]

Just think how fast that new GenIII is gonna be now that you've got a newly lightened wallet :evilsmiley03:

 

[CopB8]

Just think how fast that new GenIII is gonna be now that you've got a newly lightened wallet :evilsmiley03:

I did factor that in on my 1/4 mile calculations. An impressive gain.

 

[CopB8]

Step 1 is now in motion: Clicky

 

[art miller]

When my Gen-II spins 4000 RPM she is rolling at 118 kph according to the GPS with the present BT-023 tires, worn to whatever they are and with the tire pressure set to 42 psi cold (it does affect circumference) - that's 73.13 mph - that would be 4375 rpm for 80 mph. Note that the tach is not a calibrated instrument.

My indicated speed is the same as the GPS at those speeds because I have a speedo healer that I've calibrated to the bike. If I didn't have the speedo healer my speedo would be indicating about 8% higher.

That claimed 500 rpm differential between the Gen-I and Gen-II was what Yamaha said when the Gen-II was released.

Again, thanks to all of you for your answers. It seems that when you do the hard math on the published ratios that the difference between Gen I & II is only 100-200 RPM's at 80, however many of your indicated RPMS seems to vary 300-500 RPMS.

Overall I think the addition of the gear selection indicator will at least stop me from wanting to false shift. I've ridden the current bike for 9 years and have been happy enough to keep it that long so any reduction in 5th gear RPM's will just be gravy.

Looks like I need to contact the Yamy dealer and see what I can actually purchase one for. After that I'll need to determine the value of my pristine '04 GEN I with <20K miles and get it advertised.

I'm with you on the desire for a taller final gear. I do not care if they make 5th five MPH over or add the 6th gear. I contend the FJR has adequate HP to produce 85MPH at 4000RPM. I'll take the added fuel enonomy and less engine whine and I will drop down a gear if needed to pass a string of cages.

 

[Ed Sidders]

I wonder why they do not offer a torque converter option with the torque band of the stock engine.....