By late December, I had a lot of fun (and a lot of wins) Modding this bike. However, my undoing is just right around the corner and will turn out to be 2 very expensive learning points.
My butt is tuned to sit on a hunk of leather. I've had low seats in the past, and soft seats and never really felt a need to change a thing. However, the XC really put a lot of pressure on my Sciatic nerve. As a higher end build, I elected to put a Renazco Racing seat. As a custom seat, I played the game. Schedule months in advance, have the seat at their door by a certain date....then you wait. Then week after week, excuses roll in why the seat isn't done as promised. Then, despite writing all over the form "do not change seat height", back comes a seat that they just did whatever the heck they wanted with. But you are so happy to have any seat that you don't dare try to send it back again. Sigh.
I also really wanted gripper vinyl on the top and sides, much like my seat on Dorito. Renazco basically told me that was a huge mistake....but sometimes I find the regular vinyl top like riding a greased pig. Part of that feeling is that the seat is a bit "nose down", and doesn't have a nice flat spot for you butt anymore. At least it's not hitting my Sciatic nerve though!
My butt is tuned to sit on a hunk of leather. I've had low seats in the past, and soft seats and never really felt a need to change a thing. However, the XC really put a lot of pressure on my Sciatic nerve. As a higher end build, I elected to put a Renazco Racing seat. As a custom seat, I played the game. Schedule months in advance, have the seat at their door by a certain date....then you wait. Then week after week, excuses roll in why the seat isn't done as promised. Then, despite writing all over the form "do not change seat height", back comes a seat that they just did whatever the heck they wanted with. But you are so happy to have any seat that you don't dare try to send it back again. Sigh.
I also really wanted gripper vinyl on the top and sides, much like my seat on Dorito. Renazco basically told me that was a huge mistake....but sometimes I find the regular vinyl top like riding a greased pig. Part of that feeling is that the seat is a bit "nose down", and doesn't have a nice flat spot for you butt anymore. At least it's not hitting my Sciatic nerve though!
While the seat was off at Renazco, I was busily putting on the exhaust. Sad to say this mod is probably the single worst mod execution I have had to date. It was expensive and yielded just about none of the desired effects. The main reason I wanted to replace the exhaust was because it was so hot. The heat would just waft off muffler and have little BBQ roast. I thought a less restrictive muffler, might run a bit cooler on my hiney!
SR Racing is known to have some very notable performance improvements on the bigger GSs. Without the dB killer, the muffler is nearly "HD-lover's" spec. While the dB killer does produce a nice note, it still has a heck of a crack on Wide Open Throttle. However, SR Racing does not import to the USA, so you'll need to find a dealer that will ship internationally. Good news, I suppose, is that Scheffelmeier Metall is game to act as a middle man for me.
SR Racing is known to have some very notable performance improvements on the bigger GSs. Without the dB killer, the muffler is nearly "HD-lover's" spec. While the dB killer does produce a nice note, it still has a heck of a crack on Wide Open Throttle. However, SR Racing does not import to the USA, so you'll need to find a dealer that will ship internationally. Good news, I suppose, is that Scheffelmeier Metall is game to act as a middle man for me.
Here's some Dyno data from the Bigger GS (R1200s) on the SR Racing Exhaust:
SR-Racing Exhaust
I just installed German RS-Racing exhaust, full system to my R1200GS.
I dynoed it to get better understanding what is the situation with standard pipe in comparison to after market one.
We did three options:
1. Original STD pipe
2. SP-racing full system (headers, Y-piece, connector, muffler)
2. RS-racing full system withour DB killer.
If someone can host images of dyno charts, I can share them with you.
Comments:
There is no point revving GS over 6000 rpm, Torque drops steeply and overall power output remains quite even after 6000rpm.
SR-Racing pipe gives SIGNIFICANT improvement between 4000-6000 rpm, with or without db killer. There is 4-6 Nm increase over the rev range 4-6k.
With DB killer, torque is very same with STD pipe around 2-4k, with out DB killer there is ~2Nm improvement. However DB killer makes a dip around 4,8-5k in comparison to "with DB killer".
STD pipe drops torque quite steeply after 5,6k, SR-racing pipe extends max torq to 5,5 - 6,2k rpm, and it stays about 2 Nm higher untill rev limiter kicks in.
Sound with DB killer is very comparable to STD pipe, without DB killer it is a lot louder, but not even close to "HD-lover's" spec.
Max output from rear wheel
STD: 88.53 HP at 7600rpm
SR_rac: 89.20 HP at 7500rpm
No DB: 90.33 HP at 6900rpm
Max Torq from rear wheel
STD: 101.14Nm at 5700rpm (over 100Nm 5600-5900)
SR_rac: 102.24 at 5900rpm (over 100Nm 5600-6200)
No DB: 102.46 at 5900rpm (over 100Nm 5500-6300)
All runs were done at the same day, STD pipe in the morning and SR-racing pipe in the evening.
I will stay with SR-racing pipe without DB killer for now
The connecting pipe is poorly shielded, and now besides heating my hiney, the connecting pipe is scorching the left leg of all my Gortex riding apparel.
The install was a bit miserable. The can to this day still wants to rotate. I think the only next step will be someone to weld Titanium and permentently weld the inlet pipe to the muffler and also add another clamp. The tally thus far--we've spent a lot of cash, still have a hot hiney, now have another issue of melting Gortex pant legs and a muffler that wants to cant/rotate.
Off to the next mods and hopefully rethink what to do with these.
Off to the next mods and hopefully rethink what to do with these.