When I hit the gas on my 02 SRX my rpm's jump to about 8500. When I get around 100mph it starts to drop off to 8000-8100. Do I seem to have my clutching right? Also, when I am cruising about 80-85mph and I squeze the throttle all the way down fast, the rpm's only come up to around 8100, is this good? Can anyone tell me. Thanks.
2000 SRX rpm's
- Thread starter chadman
- Start date
SRX700Andrew
New member
Has the rpms always dropped like that or is this a new thing? Twice before I had the exact same thing happen and the cause was a broken button on my secondary.
yamaholic22
Active member
you need to tell us what you have done to your clutching in order to make an accurate inference.
I have a Hi-Tech performance E-R roller secondary clutch kit with a silver/blue polaris spring. The primary cluth has the stock weights with the outer rivets 2 sizes smaller than stock. I have the hauck inside primary sheave and I also dropped to a #22 small gear. The rpm's never came up to 8500 until I put the lighter rivets in. The rpm's have allways dropped off when I hit 100 or so.
cacsrx1
New member
Its the secondary. I tried everything to get my 911 ER to work right and it never did. Traded it for a stock clutch with 51-43 helix, one of the best things I ever did. The 911 back shifts great, but it will do exactly what U describe no matter what spring or helixs U try to tune it with. Been there dun that. It only took me two years to figure it out. 
yamaviperGS30
New member
- Joined
- Jan 10, 2004
- Messages
- 40
My rpm's rised with my Hi-tech er, your setup must need help. What angle helix are you running and ditch the silver/blue spring, Duane has a new spring that works pretty well. My top end was super with his kit, and rpm's were great but the upshift is a little quick with his roller.
cacsrx1
New member
Its shifting too fast, thats whats pulling your rpms down on top. I tried different helixes and used all different springs (ones they recommended) with pretty much the same results. It would overrev out of the hole and die on top. If tried to wrap the spring tighter it would really overrev and still only hold 8000 on the top. I tried messing with the weight in the HC's in the driven clutch with no luck. Finally I went to a stock RX-1 secondary (51-43)with a green spring set at 80, now it holds 8400 and creeps to 8500 with a tip heavy HC set up. Way way way quicker and faster than with the 911.
yamaholic22
Active member
if you are getting good traction right now it shouldn't have any effect. All depends on conditions though. It will obviously change on ice, but on loose snow it should be a pretty even playing field.
yamaholic22
Active member
as most others suggested, it is shifting too fast on the outer end of the shift, which is pulling your rpm's down. This could be due to too much weight in the outer holes of the weights (but it sounds like you have lightened them up), or more likely it is way too much helix for the shift out. The initial angle is good because it is taking you to peak rpm, but on top end it is loading the engine too much, bogging it down to 8100. Personally, i didn't find much benefit in running the rollers, just made clutch tuning a lot more finicky. They can be beneficial in conditions of constant high loads such as mountains/deep snow, but for trail riding i like traditional button clutches much better. If you are intent on running the roller though, get a helix with like 6 degrees less final angle and that should get you started. Also look on your clutches and see if there are any blackmarks, because that will tell you if the clutches are slipping and if they are, you need to get more clutch squeezing force, depending on which clutch is slipping.