Administrators Bryan Bosch Posted July 23, 2015 Administrators My Ride Report Share Posted July 23, 2015 Well, I simply couldn't pass on an additional 15% off dealer pricing on Yoshimura products yesterday and today. So, I picked up one of their RS4 slip ons. Not that the stock Tiger exhaust sounded bad. But, to me, it seem cartoonishly large for the bike and fairly heavy at 12.5lbs. And, it's a bike, so farkles are fun! Stock Sound - The Unmistakable "Whirl" of a Triumph Triple Yoshimura RS4 Slip-on Definitely more "bark"! Took it for a short ride and while louder, not loud or obnoxious. Now she sounds like she has a pair. Also, the Tiger breaths through a straw, so throttle response down low can be be a bit soft until revs build. Now, it might be just my butt dyno talking, but throttle response feels improved and the bike pulls a bit harder down low. It always pulled strong from the mid-range to red-line, but definitely stronger in this area. Pop on crackly/snap/pop on decel has increase slightly, but I can't say it bothers me. I can always pull in the clutch and slow down with just the brakes, avoiding engine braking. And, I think it looks a whole lot better, more proportionately sized for the bike: Total weight savings over stock: approx. 4.8lbs., soon to be negated by some farkle addition in the future. 4 Link to comment Share on other sites More sharing options...
Administrators Eric Hall Posted July 23, 2015 Administrators My Rides (3) Report Share Posted July 23, 2015 NICE! You couldn't resist after seeing the project 990, huh? I can't say I blame you. I like that "butt dyno." I'm going to borrow that Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted July 23, 2015 Author Administrators My Ride Report Share Posted July 23, 2015 The downside is that it took on a bit of a hooligan attitude. Hard to not get on it everywhere. It just sounds so nice! Link to comment Share on other sites More sharing options...
BruceT Posted July 23, 2015 Report Share Posted July 23, 2015 does this "slip on" make my Triumph look phat?......much better look,I can't believe how big that stock can is...is it a Catalytic too? Link to comment Share on other sites More sharing options...
swl Posted July 23, 2015 Report Share Posted July 23, 2015 Sounds a lot better Bryan- Not too noisy. I've looked at them and almost puller the trigger. Only think missing for me would be a heat shield for the wifey. 1 Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted July 23, 2015 Author Administrators My Ride Report Share Posted July 23, 2015 does this "slip on" make my Triumph look phat?......much better look,I can't believe how big that stock can is...is it a Catalytic too? No... the cat is just after where the header turns under the right side of the engine. The can is just big, with a chambered steel core for max weight. 1 Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted July 23, 2015 Author Administrators My Ride Report Share Posted July 23, 2015 Sounds a lot better Bryan- Not too noisy. I've looked at them and almost puller the trigger. Only think missing for me would be a heat shield for the wifey. That makes sense.... My wife thinks I ride a death machine and won't ride with me. 1 Link to comment Share on other sites More sharing options...
swl Posted July 25, 2015 Report Share Posted July 25, 2015 Bryan- Do they come equipped with a spark arrestor? Checked the Yosh site and it did not specified or I missed it-Thanks Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted July 25, 2015 Author Administrators My Ride Report Share Posted July 25, 2015 Bryan- Do they come equipped with a spark arrestor? Checked the Yosh site and it did not specified or I missed it-Thanks No, doesn't come with it. But, that's a good point. Honestly, didn't thing about that. I'm going to see if Yosh has one as an accessory. Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted July 25, 2015 Author Administrators My Ride Report Share Posted July 25, 2015 http://www.motorcycle-superstore.com/65699/i/yoshimura-rs-4-spark-arrestor-insert In looking at the Yoshi site, I see a few for the RS4 , 1.375" dia., 1.500" dia., and one product called NSERT KIT Spark Arrestor RS-4 , Turn-Out Cap. Not sure which one just yet. Instructions: http://www.yoshimura-rd.com/images/SA-13-K.pdf Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted July 25, 2015 Author Administrators My Ride Report Share Posted July 25, 2015 Emailed Yoshi... I'll let you know what they say. Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted July 29, 2015 Author Administrators My Ride Report Share Posted July 29, 2015 No S/A for the Tiger. Yoshi figured that the bike would not be ridden off-road. 🙄 But, that begs the question... The bike has a cat. Do you NEED a s/a if you have a cat? I know that jeeps go off-road and they don't have a s/a. Anyone know for sure? Link to comment Share on other sites More sharing options...
swl Posted July 29, 2015 Report Share Posted July 29, 2015 I don't know if the stock muffler is a S/A or not- Know that you can look down the outlet and it's blocked. They always checked at races for the S/A. Might not be that big of a deal. Link to comment Share on other sites More sharing options...
FlyinTiger Posted August 31, 2015 My Ride Report Share Posted August 31, 2015 http://www.fs.fed.us/eng/pubs/html/03511307/03511307.htm "The term “passenger vehicle” can encompass a wide range of motor vehicles. Most State vehicle codes differentiate between vehicles used for transportation and those used for recreation purposes. Dune buggies, motorcycles, and all-terrain vehicles (ATVs) are required to meet spark arrester regulations because they are not considered passenger vehicles." Link to comment Share on other sites More sharing options...
FlyinTiger Posted August 31, 2015 My Ride Report Share Posted August 31, 2015 The RS4 is just right. Sounds great! I want one! 1 Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted August 31, 2015 Author Administrators My Ride Report Share Posted August 31, 2015 I'm pretty happy with the Yoshi. Not too loud for longer runs and it really improved the throttle response. I think a richer map would help as there is a decent amount of crackles/pops on compression deceleration, but I think that it sounds mean. I'm sure it's running a tad on the lean side. Link to comment Share on other sites More sharing options...
FlyinTiger Posted September 1, 2015 My Ride Report Share Posted September 1, 2015 I also like that it saves almost 5lbs! Link to comment Share on other sites More sharing options...
Administrators Bryan Bosch Posted September 2, 2015 Author Administrators My Ride Report Share Posted September 2, 2015 To be fair, I can't say that the weight saving is noticeable. But, the absence of the cartoonishly large stock can is. The Yoshi just makes the bike look less bulky. Link to comment Share on other sites More sharing options...
FlyinTiger Posted September 2, 2015 My Ride Report Share Posted September 2, 2015 I see what you mean. In my case, the GL bags would make it basically unnoticeable. The less weight I have to finesse, the better. lb here, a lb there. Function, durability, weight loss (and a clearance sale) is my thought process. And, I'm not going to hide that the sound of that can ripping through the air vs. stock is always fun! Link to comment Share on other sites More sharing options...
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