Honda trx90 Shifting made EASY .. Free Mods

A brief rundown of cutting your existing shifter clutch actuator , to bypass the clutch spring pressure out of the upshifting motion in the shift lever. Let's you upshift with the pull of one finger.

[@jeremiahpruitt5535]

thanks for the info, my son races xc with trx 90 and its hard to get all the power you can with stock parts. simple things like this can make a huge difference. good work

[@kwikfixer]

Thanks man...I try to pass all the free stuff along that I can ... If one kid gets a better riding experience from it ,then I know it's totally worth sharing.

[@jeremiahpruitt5535]

so question, if i cut the green neutral wire, will the neutral light stay on the dash?

[@doubleg1328]

Excellent idea, I just may have to try your upshift modification out as I believe my semi auto setup is internally the same as your TRX90. I have an ATC 70 running a Piranha 90cc semi engine, TBolt 114cc cylinder, ported head, and TB300 cam. The motor runs fantastic, but I always struggle upshifting the semi auto when winding out the RPMs and must wait for them to fall back down before it will finally shift.(very frustrating) It does upshift "reasonably well," just puttering around under much lower RPMs, but what fun is that? 😀 Did you have a similar experience before you modified the internal clutch actuator?

[@kwikfixer]

Your shifter/clutch actuator may not be set loose enough. The adjustment is the nut n stud sticking out of the clutch cover. 1/8-1/4 turn from seated is the sweet spot , to actuate the clutch ,so the trans and motor equalize as quick as possible at shift points . Turn the locking nut Left/ counter clockwise..to unlock it.. Using a flat head screwdriver, turn the stud counter clockwise ,as if screwing it out.. until it gets tight,,,. It'll be seated to the clutch throw out bearing .. Then turn opposite, clockwise/ right.. 1/8-1/4 turn... To get the best area of clutching when shifting. This adjustment is the same as adjusting a hand clutch.. the hand clutch action ,is actually being done through the foot shifter

[@motoxer115]

hmmm am I doing this wrong ? I tried to copy exactly what you did and it works awesome BUT after a quick up shift on a start it gets stuck and will not down shift. I pull the cover back off, start over and get the same result. I started small and took off more and more of the part and still the same. Works fine up and down while in the shop on the lift but once its ridden it gets locked up and towed back. I ordered the replacement already.

[@darbybarnett3356]

Can I buy a set of your rear swing arm long travel shock mounts?

[@kwikfixer]

Absolutely .. email me if still interested.. [e-mail]

[@coltonbaird7037]

I have a 2000 model trx 90 and it won’t go through the gears it would go into 1st and for the rest I had to reach down and turn the little splined shaft that sticks out the case and in third i have to hold the shifter up or it try’s to go back to second but the other day it started not even going into first I can figure it out do you maybe know what might be wrong with it?

[@terpyturtlestation]

Where did you get the aftermarket clutch from? An definitely interested in your rear shock mount bracket

[@kwikfixer]

All custom

[@imaboss1998]

My girlfriends trx90 shifter doesn't return I'm gonna look into it this weekend any thoughts on some parts I could scoop from honda before taking it apart riding seasons going fast hate to miss anymore days if you re position the shifter it works but it's difficult and I worry it's gonna cause a bigger issue if she keeps riding it like that

[@kwikfixer]

I wouldn't by anything till the clutch cover is off and inspected. Like it's something to do with the return spring on the shifter shaft ..located behind the primary clutch, it wraps around the shifter shaft. That's not the only possibility ..but it would be my first guess . You'll drain oil .. tilt quad up on a jackstand..and Remove the 8 mm bolts. Be prepared to have to scrape and replace the paper gasket on cover, it usually tares .. you absolutely have to have it on there to keep correct clearance of clutch cover to the moving internal parts. Feel free to get with me on parts you suspect after inspection..I keep most on hand ,and can priority mail them if you use PayPal.

[@imaboss1998]

@@kwikfixer amazingly fast and specific response definitely subbing thank you for your suggestions just wanted a little insight me and my buddy once pulled a Hayabusa engine and installed a entire gear set in it worked out great doesn't hurt to ask you seem to know your stuff when it comes to these little atvs ! Never had a problem with it till recently had it new since 2006 can't complain things a champ

[@Lyons17r]

I have 2 5 year old girls racing 2006 and 2007 TRX 90s all stock and it’s hard for them to upshift as far as it needs pulled and pressure it needs after the long pull and in racing boots it’s just tough for them. Thinking of maybe a shift lever welded on to the back so it’s shoving down to go up as well on the back? Any tips or would this help

[@Lyons17r]

They are also still learning when and how to shift in “how” I mean letting off the gas, most of the time it’s not a smooth transition going up.

[@kwikfixer]

The hard shifter pressure is due to the primary clutch springs.. same basic clutch setup as a regular dirtbike..cr85 ..etc. By cutting this actuator arm on one side ,. You'll eliminate clutch pressure on up shifts.. I have seen a few people use a heel/toe shifter .. it works well for the smaller kids with the tiny short feet.

[@SHARKBOY10203]

My 2004 Trx 90 sportrax has a metal on metal grinding like sound when its cold, do you by chance know anything about that?

[@kwikfixer]

Maybe needs timing chain serviced..or a bearing going out.. Hard to say without tear down.

[@SHARKBOY10203]

@@kwikfixer Thanks! I didn't think you were going to respond

[@sandman7735]

I have no idea what you are rambling about...lol

[@kwikfixer]

You'd have to understand how this particular part works I guess.. and how much trouble it can be for kids to upshift a trx90 with upgraded clutch springs. I made this video after a long day for a friend who was wondering how I made my pit quad shift so easy.

[@sandman7735]

@@kwikfixer Hey no problem, I will just have to watch it multiple time. I will get it eventually