I always thought my revs went up after a lower gearing change. Others are convinced RPM drop after the gear change. Do lower gears equate to lower clicker settings or am I halucinating?
Gearing down=Higher or lower RPM?
- Thread starter GROOTSKY
- Start date
I'm talking about gearing down to bring my revs up therefore allowing me to run in a lower clicker position.
Gearing DOWN as in deeper gearing, will increase RPM and lower top/ground speeds.
Simply, gearing down will allow for reaching peak RPM quicker, and easier..mostly under load.
Sounds like most the new Summits are geared too high, at least I don't really need 90-95 MPH out of my mtn sled....in most situations!
On a shorty, down rail road beds or lake running...well...I still prob dont need it, but it can be a rush!
Simply, gearing down will allow for reaching peak RPM quicker, and easier..mostly under load.
Sounds like most the new Summits are geared too high, at least I don't really need 90-95 MPH out of my mtn sled....in most situations!
On a shorty, down rail road beds or lake running...well...I still prob dont need it, but it can be a rush!
M
Modedmach1
Well-known member
I thought gearing lower would drop your RPM's when you are climbing cause your clutchs are shifting out more. I could be wrong though.
A properly calibrated secondary will backshift to compensate for load changes but i think lower gearing might put less of a load on the secondary which may pull down your RPM a bit.
Grootsky is right. Gearing down as in going from 2:1 to 2.1:1 will result in a RPM drop. Many claim that since your clutches are now closer to a 1:1 shift ratio, the more efficient clutching will make up for a loss in RPM's. I've found it doesn't work that way. Everytime I have geared down, leaving all other variables alone, I will lose RPM's and backshift. Be prepared to run lighter in the primary and possibly more tension in the secondary to get your backshift. I've had to run a couple degree less helix in order to maintain a decent backshift after gearing down. The reason for this is your secondary is torque sensing and now feels less of a load from your track (lower gears) thus allowing it to upshift. It may upshift you right out of the powerband.
My setup is: 07 adreniline stock secondary(44 degree helix) 160-350 primary spring with2mm oversize rollers (5 gram heavier than stock) with RK Tek head. I run at clicker 4at 8300 +- RPM at 5000 ft elevation with 450 mains. I want to run at clicker 3 but i cant get revs at that setting. My pins are hollow with all weight removed, I've even ground 1.5 gram off of the ends of the pin to gain RPM.
Obviously I could run stock rollers but I,m stubborn. If I was content at clicker 4 could I gear down which will lower revs slightly. Will the faster/ higher upshift in the secondary gain more track speed than the higher gearing setup?
Obviously I could run stock rollers but I,m stubborn. If I was content at clicker 4 could I gear down which will lower revs slightly. Will the faster/ higher upshift in the secondary gain more track speed than the higher gearing setup?
After you find a combination that yields proper RPM with the lower gears you may gain a little trackspeed because your clutches are now running in a slightly more efficient shift ratio. Trackspeed gains won't be much, possibly only one MPH or so. The biggest reason most people gear down is your belts/sheaves will run noticeably cooler when pulling big hills or big powder.
I geared down but I added ruffly 8hp and I'm still not hitting the right R's.
I guess I thought if I geared down I'd gain rpm's but I guess not.
You'd think with gearing down and adding 8 hp I'd be over reving...wouldn't you?
I guess I thought if I geared down I'd gain rpm's but I guess not.
You'd think with gearing down and adding 8 hp I'd be over reving...wouldn't you?
You can get aluminum pins, solid or hollow that are lighter than the hollow steel. You will need to run a higher spring rate secondary spring to get the OS rollers to back shift. This was a problem I ran into when I tried them.
