- Joined
- Mar 17, 2018
- Messages
- 804
- Location
- Washington
Hello everyone, not sure how many have been following the SBU V4R build on YouTube, but they recently developed a bracket that relocates the wheel speed sensor to the bottom of the eccentric hub while retaining the ability to use the OEM brake caliper. Their build is on a Corse swingarm, so I figured I'd let you guys know how well it functions on a OEM swingarm.
It bolts up perfectly fine, just not as simply as you would expect.
1. You have to feed more of the wire for the speed sensor through to the rear of the bike. Takes undoing some zip ties, a bracket, and peeling off heat tape that joins the cable to the rear brake line. Once you do that, best solution seems to be copying SBU and running it over the top of the swingarm around the rear and to the mounting point. Was able to do so despite the oversuspension.
2. You will have to remove the OEM chain/swingarm guard. My V4 is no longer a road machine so this isn't the biggest deal to me, but since the bracket lowers the eccentric hub significantly, the chain will lay on the guard and bend around it. Once you remove it, the chain is unobstructed. However, the stock chain guard wraps all the way around the front of the swingarm in one piece, making it a pain in the ... to remove. I intend on trying to shape mine into still being functional by removing a lot of material, but did not accomplish that today.
3. OEM rear brake line is a no-go for two reasons. For one, at the lower position range of the hub, the line is forced to bend outward and contacts the wheel. Secondly, the chain guard assists in keeping the OEM line away from the chain, removing it makes them uncomfortably close.
Make sure you have snap ring pliers that are good and open up to roughly 2 inches because the ring that holds the bracket on is a beefy .......
None of the workarounds it requires are dealbreakers for a track bike, but might be too much of a hassle for a road machine. Not a bad way to get quite a bit of extra rear ride height without having to mess with suspension.
It bolts up perfectly fine, just not as simply as you would expect.
1. You have to feed more of the wire for the speed sensor through to the rear of the bike. Takes undoing some zip ties, a bracket, and peeling off heat tape that joins the cable to the rear brake line. Once you do that, best solution seems to be copying SBU and running it over the top of the swingarm around the rear and to the mounting point. Was able to do so despite the oversuspension.
2. You will have to remove the OEM chain/swingarm guard. My V4 is no longer a road machine so this isn't the biggest deal to me, but since the bracket lowers the eccentric hub significantly, the chain will lay on the guard and bend around it. Once you remove it, the chain is unobstructed. However, the stock chain guard wraps all the way around the front of the swingarm in one piece, making it a pain in the ... to remove. I intend on trying to shape mine into still being functional by removing a lot of material, but did not accomplish that today.
3. OEM rear brake line is a no-go for two reasons. For one, at the lower position range of the hub, the line is forced to bend outward and contacts the wheel. Secondly, the chain guard assists in keeping the OEM line away from the chain, removing it makes them uncomfortably close.
Make sure you have snap ring pliers that are good and open up to roughly 2 inches because the ring that holds the bracket on is a beefy .......
None of the workarounds it requires are dealbreakers for a track bike, but might be too much of a hassle for a road machine. Not a bad way to get quite a bit of extra rear ride height without having to mess with suspension.