New Dr Pulley HIT racing clutch installed
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Hooked
2009 MP3 400
Joined: 21 May 2013
Posts: 398
Location: Walnut Creek, CA
Sun Jun 21, 2015 6:41 pm quote
Motovista wrote:
ericreynolds wrote:
The new clutch optimizes climbing. Today, on the same grades, I could maintain speed and didn't have to go full throttle. When passing a car, the burst of speed between 65 and 80mph was impressive.

So far, so good.

Eric
I would be interested in hearing how the Dr. Pulley clutch affects your speed between 65 and 80 mph, and what mechanically is happening to make that possible.
For me, I remember how sluggish my 400 was going from 65 to 80mph. The change is evident. The HiT clutch doesn't increase the power of my scoot, it maximizes what is already there. I also have the Pulley sliders and fuzzy washer. They're a winning combination.

A member posted some thorough research on the CVT and the HiT clutch.

Eric
Hooked
2019 MP3 500hpe Sport
Joined: 03 Nov 2014
Posts: 435
Location: Germany
Sun Jun 21, 2015 9:41 pm quote
I am starting to get some chatter from take off from mine as of late. A quick run down the autobahn does help clear that up when i get to the next traffic light on my way to work. a little annoying but i am not sure if the shop that did the install sanded the bell or how well they sanded it. coming up on my next service with belt change, so i may have them sand it up a little bit.
Hooked
2009 MP3 400
Joined: 21 May 2013
Posts: 398
Location: Walnut Creek, CA
Sun Jun 21, 2015 10:06 pm quote
new200guy wrote:
I am starting to get some chatter from take off from mine as of late. A quick run down the autobahn does help clear that up when i get to the next traffic light on my way to work. a little annoying but i am not sure if the shop that did the install sanded the bell or how well they sanded it. coming up on my next service with belt change, so i may have them sand it up a little bit.
How long have you been running with your current clutch and pillow springs configuration? While experimenting with different spring combinations, certain configurations resulted in chatter at lower rpms. I finally dialed in a configuration that works best without the chatter. I've taken the tranny apart several times to inspect for any unusual wear patterns. Everything looks good. As for the clutch drum, I took BubbaJon's advice and sanded the inside using crosshatch patterns.
Hooked
2019 MP3 500hpe Sport
Joined: 03 Nov 2014
Posts: 435
Location: Germany
Wed Jun 24, 2015 10:53 am quote
i have been running it now for about 3000 km or so. coming up on my next service here in about 2000km. what combination are you running eric? maybe when they have the tranny apart for the belt change, i can have them replace the springs to your setting.

again, not sure about the sanding bit, but i am sure they did not do as bubbajon suggested.
Hooked
2009 MP3 400
Joined: 21 May 2013
Posts: 398
Location: Walnut Creek, CA
Wed Jun 24, 2015 1:29 pm quote
new200guy wrote:
i have been running it now for about 3000 km or so. coming up on my next service here in about 2000km. what combination are you running eric? maybe when they have the tranny apart for the belt change, i can have them replace the springs to your setting.

again, not sure about the sanding bit, but i am sure they did not do as bubbajon suggested.
25kg pink pillow spring set with 10kg black clutch spring set.
Hooked
2019 MP3 500hpe Sport
Joined: 03 Nov 2014
Posts: 435
Location: Germany
Wed Jun 24, 2015 8:57 pm quote
so, i looked through all my springs and have those in the box. how does that set up work for you? What is is revving to when you initially twist the throttle? what do you hit when you are at full throttle on a 0-60 run, and what does it rev out too when you are over 60 miles per hour?

for me in the order i asked the questions:
4000 at initial twist to start off
5800 or so up to about 60 miles per hour
after 60mph, steadily goes up to about 7000 as speed increases.

This is all on the original setup that the clutch comes from dr. pulley.
Hooked
2009 MP3 400
Joined: 21 May 2013
Posts: 398
Location: Walnut Creek, CA
Thu Jun 25, 2015 9:41 pm quote
new200guy wrote:
so, i looked through all my springs and have those in the box. how does that set up work for you? What is is revving to when you initially twist the throttle? what do you hit when you are at full throttle on a 0-60 run, and what does it rev out too when you are over 60 miles per hour?

for me in the order i asked the questions:
4000 at initial twist to start off
5800 or so up to about 60 miles per hour
after 60mph, steadily goes up to about 7000 as speed increases.

This is all on the original setup that the clutch comes from dr. pulley.
Your rpm results are pretty much spot on for the default set up. I've tested the default and two other spring combinations. I like the pink/black combo the best for my riding style - quick off the line and smooth for highway speeds.

When I give it throttle from the line, it goes straight to about 5K to 5.5K rpm, hitting 6K tops under 60mph. I'm up at around 7K rpm when hitting 60mph and above and that's pretty much tops until I hit the scoot's speed limit around 85mph.

The pink/black spring combo will definitely give you a better takeoff than the default settings.

I hope that helps.

Eric
Hooked
2019 MP3 500hpe Sport
Joined: 03 Nov 2014
Posts: 435
Location: Germany
Fri Jun 26, 2015 2:30 am quote
I am going to assume the clutch needs to come off in order to change the spring or can this be done by removing just the transmission cover and getting at the springs?

You information has been very helpful and I fully appreciate what you have contributed to the Dr pulley clutch thread.

I truly love forums like this one.
Hooked
2009 MP3 400
Joined: 21 May 2013
Posts: 398
Location: Walnut Creek, CA
Fri Jun 26, 2015 6:35 am quote
new200guy wrote:
I am going to assume the clutch needs to come off in order to change the spring or can this be done by removing just the transmission cover and getting at the springs?

You information has been very helpful and I fully appreciate what you have contributed to the Dr pulley clutch thread.

I truly love forums like this one.
When the clutch drum is removed, the pillow springs are exposed. I replaced the pillow springs without removing the clutch because I already had the black 10kg clutch springs on there as part of the default installation. I'm not certain that it is advisable to do it the way I did, but it worked.

A week later, I acquired a fantastic custom made clutch removal compression tool from BraveTwoFour who got it from ponydrvr. The tool makes it easy for me to disassemble the clutch so that I can get to the clutch springs and change the pads.
Hooked
MP3 400
Joined: 30 Nov 2009
Posts: 199
Location: Brisbane
Sun Apr 07, 2019 12:11 am quote
Hi,
After 75,000km the 15gm sliders are now due for replacing.
Will be matching 16gm DrPulley Black Pearl sliders with a 251701 V4 HiT clutch.

What's the optimum spring weights for a V4 HiT clutch on a 400ie? The weights referenced above don't apply to the V4 clutch.
Cheers,
DBM

hit.jpg

Hooked
2009 MP3 400
Joined: 21 May 2013
Posts: 398
Location: Walnut Creek, CA
Sun Apr 07, 2019 5:28 am quote
dbm wrote:
Hi,
After 75,000km the 15gm sliders are now due for replacing.
Will be matching 16gm DrPulley Black Pearl sliders with a 251701 V4 HiT clutch.

What's the optimum spring weights for a V4 HiT clutch on a 400ie? The weights referenced above don't apply to the V4 clutch.
Cheers,
DBM
I donít know for a V4. I would recommend contacting Lia and Paul at Dr. Pulley. Their email is service@unionmaterial.com
Hooked
MP3 400
Joined: 30 Nov 2009
Posts: 199
Location: Brisbane
Thu Apr 11, 2019 2:01 am quote
After 75,000kms of faithful service and perhaps a bit of weight loss, the 2517 DrPulley sliders have done their duty.

And now these 2516 black pearl bad boys have gone in.

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Hooked
MP3 400
Joined: 30 Nov 2009
Posts: 199
Location: Brisbane
Thu Apr 11, 2019 2:09 am quote
And the OEM horseshoes after 86,000kms is time to go

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Hooked
MP3 400
Joined: 30 Nov 2009
Posts: 199
Location: Brisbane
Thu Apr 11, 2019 2:36 am quote
And the OEM clutch has done 86,000kms and in has gone the HiT clutch V4 with only the clutch spring changed to 10kg.

And the end result is astounding (albeit just a 10km ride). No shudder at low speed. No lag when accelerating. No unwanted noise as mentioned by others previously. And perhaps my right wrist may have cramped in a downwards direction in an 80km/h section of road and the takeoff was brisk. As someone once said "Turbines to power!"

Very, very pleased with this transformation.
DBM

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