HD Stage 4 Tire Shredder Kit - Road Glide Forums
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post #1 of 29 (permalink) Old 06-13-2018, 12:45 AM Thread Starter
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HD Stage 4 Tire Shredder Kit

Anybody running the H-D tire shredder kit? Good? Bad? If you're running this kit, roughly what was the cost installed? Is there a better set of cams that can be added to this kit to make a little extra power?

For those that are going to say it, no, I'm not interested at this time in replacing the entire engine. Yes, I know some independent shops 'might' be able to do a better job. I've tried talking to some of them. Most won't take the time to call back. One outright lied to me about the process. I know there may be better kits, but I really want to get this build done before riding out to the Sturgis Rally, and I'll like to bump up the power on this scoot. Right now it feels like it drops off sharply at 100 mph.

Willing to listen to opinions and suggestions (and thanks for chiming in).

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post #2 of 29 (permalink) Old 06-13-2018, 04:29 AM
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Quote:
Originally Posted by TLKurtz View Post
Anybody running the H-D tire shredder kit? Good? Bad? If you're running this kit, roughly what was the cost installed? Is there a better set of cams that can be added to this kit to make a little extra power?

For those that are going to say it, no, I'm not interested at this time in replacing the entire engine. Yes, I know some independent shops 'might' be able to do a better job. I've tried talking to some of them. Most won't take the time to call back. One outright lied to me about the process. I know there may be better kits, but I really want to get this build done before riding out to the Sturgis Rally, and I'll like to bump up the power on this scoot. Right now it feels like it drops off sharply at 100 mph.

Willing to listen to opinions and suggestions (and thanks for chiming in).
I purchased this kit to install on a 2016 Road Glide, The mechanic at the Harley dealership recommend, I purchase the 585 Cams, along with the hi-flow cam plate and oil filter. They quoted me a total of 16 hours for the install which include a full dyno tune. I am schedule to do the install the week of the 19th... I also purchase the orange Harley tuner.
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post #3 of 29 (permalink) Old 06-15-2018, 12:13 AM Thread Starter
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Quote:
Originally Posted by bykw2 View Post
I purchased this kit to install on a 2016 Road Glide, The mechanic at the Harley dealership recommend, I purchase the 585 Cams, along with the hi-flow cam plate and oil filter. They quoted me a total of 16 hours for the install which include a full dyno tune. I am schedule to do the install the week of the 19th... I also purchase the orange Harley tuner.
I just got a quote from Las Vegas H-D. The hours you were quoted are right on par with what they said. I was told 12-hours plus the tune, which will put it around the 16-17 hour mark. They claim it should be around 110hp / 110tq with the Tire Shredder kit as is, without changing out the cams the kit comes with. Never really know how that works out, but guess I'm going to go with this kit. Will know more in a few weeks.

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post #4 of 29 (permalink) Old 06-15-2018, 05:59 AM
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Good luck, keep us posted!


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post #5 of 29 (permalink) Old 06-15-2018, 08:47 AM
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I have the tire shredder kit on my 2011 Limited. In total cost me around $8,000 which included the tune and I replaced the front suspension as well at that time. That kit, a ThunderMax ECU, Supertrapp 2-1 and the High Performance A/C dyno tuned at 110hp/119tq. I will see if I can find the dyno tune sheet but those were the numbers. I didn't change the cams and just used the kit the way it was delivered.
I had it installed when I was in NC at Durham HD ( I believe is Raging Bull HD now) a few years ago. I don't ride the bike too much anymore because I found out how much I love the Shark! But it was a blast to ride and always fund once in a while to hop on.
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post #6 of 29 (permalink) Old 06-16-2018, 07:34 PM
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Had a stage 4 done on my 13. I got 25000 miles before the crank bearing went out. I would suggest get the crank reworked.
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post #7 of 29 (permalink) Old 06-17-2018, 10:49 AM Thread Starter
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Had a stage 4 done on my 13. I got 25000 miles before the crank bearing went out. I would suggest get the crank reworked.
That's a little worrisome.

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post #8 of 29 (permalink) Old 06-20-2018, 04:53 PM
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That's a little worrisome.
I wouldn’t let it be.
There are a lot of variables in a failure.


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post #9 of 29 (permalink) Old 06-20-2018, 07:07 PM
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I put one in my 11 over the winter. Paid $2563 for the kit. Then another $100+ for a bigger air cleaner kit.

Runs like a tomcat with his balls on fire. But also started hard and pinged a lot.
Pulled the SE cams and installed S&S 585 EZ starts and a gear drive. Cured the hard start and made it ping less. But still need to run some booster in the fuel when temps are above 80.


I also did a set of S&S wheels and a Timken conversion along with an S&S cam plate and three stage pump. You can run what ever pump and plate floats your boat. But oem wheels and rods is going to be asking for trouble, IMHO.


With the SE cams it had more low end power. Would lift the front wheel at part throttle. The S&S cams are timed later so it is more mid to top end now.


I run a Tmax on it and its mapped to keep the fuel targeted at 13.9-14:1 below 1/3 throttle. Was looking to get 40mpg cruising, which it does. What I didn't plan on was it running 85+ at less than 1/4 throttle. Made a run on I81 last month, me and some rider on a King. We ran almost an hour and a half at over 80, and often 90 mph. Still got 200 miles on that tank, but the pipes were scary looking when I got home. Thing is it was only taking about a 1/4 twist to run that speed. When I looked at the maps, it was showing that the scooter was running with in 5% of the mapped targets.

Left pipe wasn't all that bad


Right pipe was real white



The right pipe has a full size cross over that uses a split spacer to make it fit the head pipe. And the split is open about a 1/4 inch. Guess I need to pull it apart and seal it up.


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post #10 of 29 (permalink) Old 06-20-2018, 11:42 PM Thread Starter
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Quote:
Originally Posted by Thermodyne View Post
I put one in my 11 over the winter. Paid $2563 for the kit. Then another $100+ for a bigger air cleaner kit.

Runs like a tomcat with his balls on fire. But also started hard and pinged a lot.
Pulled the SE cams and installed S&S 585 EZ starts and a gear drive. Cured the hard start and made it ping less. But still need to run some booster in the fuel when temps are above 80.


I also did a set of S&S wheels and a Timken conversion along with an S&S cam plate and three stage pump. You can run what ever pump and plate floats your boat. But oem wheels and rods is going to be asking for trouble, IMHO.


With the SE cams it had more low end power. Would lift the front wheel at part throttle. The S&S cams are timed later so it is more mid to top end now.


I run a Tmax on it and its mapped to keep the fuel targeted at 13.9-14:1 below 1/3 throttle. Was looking to get 40mpg cruising, which it does. What I didn't plan on was it running 85+ at less than 1/4 throttle. Made a run on I81 last month, me and some rider on a King. We ran almost an hour and a half at over 80, and often 90 mph. Still got 200 miles on that tank, but the pipes were scary looking when I got home. Thing is it was only taking about a 1/4 twist to run that speed. When I looked at the maps, it was showing that the scooter was running with in 5% of the mapped targets.

Left pipe wasn't all that bad


Right pipe was real white



The right pipe has a full size cross over that uses a split spacer to make it fit the head pipe. And the split is open about a 1/4 inch. Guess I need to pull it apart and seal it up.
Yowza. Those pipes, particularly the right, is very lean. That would worry me about burning up pistons and heating up too much. In (car) racing circles, I've always heard lean is mean, but on air cooled bikes I thought a little fat was better. Just for separation, the next post will be an update on what is going on.

-TLKurtz (Mr. Wizard) - Blackhorse Cavalry Nomads VMG member (2/11 CAV - East/West German Border)
2015 RGS - Vivid Black and loads of fun.
Reside in Vegas. I keep cold beer in the fridge for all visitors.
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