Twinpot Brake upgrade on 78 Skunk

[salty_monk]

It's a single brake model I assume? Axle under the fork leg?

We can figure out something to work with that & yes I can get you some brackets, expecting a delivery Tues/Weds.

[mmitchum]

Hi SaltyMonk. Can you clue me in to what's going on here? I am in the midst of a '77 GS550 build and interested in better front brakes. I found a pointer to this thread elsewhere on the forum, but I can't quite tell what the twinpot upgrade is, what you're selling, etc. I was hoping there would be a sticky post at the top with an overview of what it's all about. Can you fill me in on what's up?

Many thanks!

[salty_monk]

I got confirmation today that I should have sets on hand approx May 20th

[salty_monk]

One back at ya...

I have placed an order. Expecting 4-5 weeks or about mid to end of May before I have them on hand. Pricing will be broadly similar (in the region of $90 a set plus shipping).

I will set up a set of the new caliper style for testing my end before I recommend anyone else go that route. The bracket is slightly smaller so should look a little neater than before too (and weigh a couple of ounces less). The Hub spacer now has the full 6 holes for bolting to the F3 calipers to make it easier to centre them for drilling. It also drops out a small amount of weight as well.

Flicked you a pm.

[salty_monk]

Trying to get a feel for demand as I have to order some more sets... It's a big outlay (more than buying a new GS) so ideally I'd like a few taken off my hands quite quickly.

This time I have made an adjustment that gives a 2nd caliper choice option.

[salty_monk]

Score! Just bought a pair of 03 Concourse calipers on eBay, complete with lines and master cylinder for $43 delivered to Alaska.

Nice! You'll need to change out those lines but the rest of it should just bolt up! Is it the Master cylinder with the square top, mirror mount & adjustable lever? That's the one I use

[steve murdoch]

Score! Just bought a pair of 03 Concourse calipers on eBay, complete with lines and master cylinder for $43 delivered to Alaska.

Score?
More like a theft, well done.

Score! Just bought a pair of 03 Concourse calipers on eBay, complete with lines and master cylinder for $43 delivered to Alaska.

[salty_monk]

Yep one back at ya. I'm low on stock of these now & will need to make a decision whether to get more in... (it's a decent size investment in the quantity I have to order to get reasonable prices).

Sent a PM. Hopefully you’ve still got a set of these available. Spring is springing and I’ve got bike projects on the brain.

[salty_monk]

this is great thread, glad I found it. I have question if you would be kind enough to help. I have a 1980 GSX 750 L GS 750, 16 valve , with the dual front brakes, and was wondering if I could keep the stock rotors and install new calipers on them using the existing brackets. I see some deals on ebay to get the concors calipers with master cylinder for about $100 which seems good.
thanks


Also I see on ebay there are new chinese calipers that claim to fit my bike, just wondering if anyone has tried them.

Not heard of or seen anyone using a Chinese caliper. I would be quite wary of that for a few reasons, fit, safety etc.

The Stock rotors are too small to allow you to fit the caliper properly, you need to change to either the single brake rotors or the CBR Rotors which are both bigger. Do you have the axle underneath or axle in front forks?

this is great thread, glad I found it. I have question if you would be kind enough to help. I have a 1980 GSX 750 L GS 750, 16 valve , with the dual front brakes, and was wondering if I could keep the stock rotors and install new calipers on them using the existing brackets. I see some deals on ebay to get the concors calipers with master cylinder for about $100 which seems good.
thanks


Also I see on ebay there are new chinese calipers that claim to fit my bike, just wondering if anyone has tried them.

[salty_monk]

Been asked for this a bunch of times.

My step by step would be:

1. Bolt rotor spacers to CBR rotors using 2x6mm bolts & nuts. Make sure central.
2. Drill the Suzuki bolt pattern using an 8mm or eq drill in a drill press.
3. Mount rotors on the wheel (spacer between the rotor & the hub) using original 6 x M10 Suzuki bolts each side. (check direction - rotors have arrows on them)
4. Mount the caliper bracket to the fork using the bottom bolt nearest the leg only (you need to find a nut & bolt for this, 10mm x 45mm if you put lock washer on outside of bracket, 10 x 40mm may be ok without the washer (for steel brackets only). Fine thread is best for "anti shake loose" if you can find it, use loctite too).
5. Cut 4mm off of the top of the speedo drive dust cover (looks like a "top hat" in profile, cut the top off of the hat). (Some older models don't need this as the cover is already short enough - usually bike with the riveted rotors as stock).
6. Mount the wheel back in the forks, tighten axle etc.
7. Mount the caliper to the top bolt
8. slide in the spacer for the bottom bolt & put that bolt in (Should be able to use stock bolts here - Steel brackets only)
9. Make sure all lines up & tighten to stock torque figures (use loctite).
10. Check clearances. The rotor rivets are usually closest point to the lower bolt. You should have 3mm plus each side & should be the same.
11. Bleed brakes
12. Check clearances & brake function (bike on jack so you can spin it).
13. Walk bike & check again
14. Ride it - take it easy till you're happy that everything is tight, clearances are good. Remember brakes need to bed in etc.

[Chuck78]

https://www.600rr.net/vb/69-07-13-rr-modifications/291047-ebay-wave-rotors-review-5.html#post5663329

"I have the Arashi rotors on a 2003 CBR600RR for about 18 months now with close to 20k miles and have not had any problems what so ever. I ride track as well... they are the generic Chinese brand and have held up well."


EDIT - I just ordered a set. Crossing my fingers that they arrive sooner than the 7-14 days from now quoted! West Virginia mountain roads are calling...