Radial brake calipers mounted on 1st gen, R1 6 piston calipers

[dingy]

Baby has brakes ! ! !

 

Took it for a short 20 mile ride tonight and I made it home.

 

Brakes are very smooth, I didn't try any hard stops, but what I did try say there is more power in these than the R1 - 4 pistons by quite a bit.

 

I attached a couple of pictures to show lever travel. 1st is normal position, 2nd, I am putting a lot of pressure on lever and I still have about an inch of travel. I can't bring the lever back to grip with anywhere near reasonable force. This is a 14mm master from an MKII pushing 12 pistons & S.S. lines, delinked.

 

I think this mod was a success.

 

 

Gary

[Yammer Dan]

Hey Gary I'll give you 10 bucks for that thing now. And you can have all that fun again!!!

 

You sure won't have any trouble finding it in the parking lot!!

[dingy]

Bob, i'm not sure what you're saying there, but the Bracket for the rear Caliper doesn't move at all under braking, even if the front of the Rod is mounted to the Frame instead of the Swing Arm, the Force on the Bracket under braking will go through the Rod and move the Frame, but not the Bracket in Relation to it's original Position.

 

1st picture below is from under bike, looking forward at torque arm for rear caliper mount. I don't have anything in front that I could get to except swing arm.

 

2nd picture is a side view of underslung mount. This is a VMax caliper arm & caliper. The caliper would not clear the saddlebags in the normal, above rotor configuration.

 

3rd picture is a view down showing clearence between swing arm and a normal 282mm MKII rotor. Ther is no way the 320mm floating offset stock rotor from a MKII would fit. This is due to VMax rear wheel being wider than a stock Venture. I elected to go with the VMax setup due to the torque arm configuration allowed me to reposition the caliper. Drawback of this is VMax never went to 100mm rear caliper mount bolts, so until I get a custom mount made I am stuck with this caliper.

 

4th picture shows swing arm out of bike with caliper, caliper arm and torque arm mounted as vied from lower side.

 

5th & 6th pictures are of the surgery it took to get a stock VMax caliper arm to fit. One on left was a rough 1st pass at it. Final one is in center & a stock, unmodified one is on right.

 

What I have seen with this bike on a dyno last year was that the rear end climbs to the top of the shock travel as it was run up to speed on the dyno. I have not noticed any adverse effects from climbing or diving in the rear due to the brake. This taking into account I am primarily a front brake user under normal conditions.

 

Gary

[Squeeze]

Gary, of Course, i saw that you're using a Vmax Setup there in reverse Mounting Position.

 

A german Vmax Specialist is fabricating such Relocation Kits, using a Clamp-On Bracket to the Frame on the front End of the Rod. Sorry, no Pics available. The Guys who sport this Setup all said they're satisfied with the Outcome. If you're a front Brake Guy, you won't get much help out of such a Setup. I thought i mention it anyway.

 

When i modify FJR-Rims to fit in the 1Gen Vmax, i have to mill down the Vmax Caliper Bracket from 30 mm to 19 mm.

 

Great to hear about your first Verdict. You'll love the Setup and there still some Room for further Upgrade, pretty easy available.

[Squeeze]

..Drawback of this is VMax never went to 100mm rear caliper mount bolts, so until I get a custom mount made I am stuck with this caliper.

..

 

Gary, my Vmax Guys over here have made Brackets for numerous different Calipers and Rotor Diameters, but most of them use the 150mm/6xM8 Bolts like we have on the 1Gen. I myself, have never looked at the rear Brake, but if you'd interested and give me the Specs you're planning on, i'll look around. As i think about it, i believe, i have a rear underslung/Frame connected Kit for a 1Gen Vmax lying around somewhere, i could look for that too.