Dr. Pulley 21 gram sliders -- a review. - Suzuki Burgman Forum
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Old 06-03-2010, 09:47 PM   #1 (permalink)
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Default Dr. Pulley 21 gram sliders -- a review.

With about 5500 miles on my 2006 Burgman 400 I installed Dr. Pulley 18 gram sliders. The original rollers were still in good shape, but I wanted to lower the engine speed at highway speeds. Belt dimensions were pretty much as new and the clutch thickness was as new also, so no changes except cleaning up the parts.

The first ride was a pleasant surprise -- engine speed was reduced from about 6700 RPM to about 6000 RPM at an indicated 75 MPH (about 70 true). Acceleration from a stop seemed a bit quicker as the engine quickly revved to about 5000 RPM and held there as speed rose. No noticeable change in gas mileage over several tanks.

There was a definite "hole" though when re-accelerating from reduced speeds in traffic, which was bearable, but annoying. Still, I could live with it.

After seeing Dennis49's offer of 21 gram sliders on this site I went for them, mostly as an experiment. Got them a few days ago and installed them today.

Another improvement! Initial acceleration is now occurring at about 4200 RPM and highway engine speeds are down another 200 RPM or so. At 75 indicated the tach now shows about 5800 RPM, which is what I was after with the original Dr.Pulley sliders. The re-acceleration "hole" is gone completely from a traffic slowdown and speed up again. This seems like a good compromise as the first generation 400s have their torque peak at about 5500 RPM, and performance is not noticeably reduced by the RPM drop. I'm going by a seat of the pants reaction, no real measurement.


For me, the 21 gram sliders are an improvement over the 18 gram units -- if they made even heavier sliders I'd consider them as well, maybe 22 or 23 grams. I'm happy with the 21 gram sliders though and will enjoy the more relaxed sounding engine on the highway now.

Just my opinion.

Ray Nielsen, in Minneapolis and back from a supper ride!
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Old 06-04-2010, 05:32 PM   #2 (permalink)
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Default Re: Dr. Pulley 21 gram sliders -- a review.

A drop in rpms on acceleration from 5,000 to 4,200 and a highway rpm drop from 6,700 to 5,800 and "performance is not noticeably reduced by the RPM drop"???? Very surprising
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Old 06-04-2010, 05:59 PM   #3 (permalink)
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Default Re: Dr. Pulley 21 gram sliders -- a review.

Did you notice any difference in terms of acceleration?
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Old 06-04-2010, 06:16 PM   #4 (permalink)
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Default Re: Dr. Pulley 21 gram sliders -- a review.

I tried the 21 grams ones in my 07 and didn't care for them. Once I went to the 18 grams ones my milage went up & my cruise rpm came down. I thing the differance is the power band between the 03-06 & the 07 & later.
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Old 06-04-2010, 09:20 PM   #5 (permalink)
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Default Re: Dr. Pulley 21 gram sliders -- a review.

I too have the 21 gram sliders - not sure about in-town performance (think it deteriated a bit). I was plesantly suprised about the highway. It seems that once I get to 65+ indicated, my RPMs start dropping. At 65, I'm hitting about 6,200 RPMs.
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Old 06-05-2010, 12:43 AM   #6 (permalink)
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Default Re: Dr. Pulley 21 gram sliders -- a review.

What is the original weight of the roller weights? (for an 2003 anyway)
I do enjoy reading other's experiences, but it's good to know what I'm starting with.
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Old 06-05-2010, 01:06 AM   #7 (permalink)
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Default Re: Dr. Pulley 21 gram sliders -- a review.

Factory rollers are 18gram.
I went to the 16 gram rollers because they were supposed to improve acceleration without reducing gas mileage (according to testimonial from someone who tried it on his Burgman). I haven't reached 55mpg city since, and the acceleration is poor unless you keep it wound up. I can accelerate acceptably at 5,000 rpm where I used to have good acceleration at 4500 rpm. Maybe 21 gram rollers would put the bike in a favorable gear ratio at 4,000 rpm. I'd like to try.

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