Planet Minis

SDGrider531 · 01-24-2009, 05:46 PM

I know this isnt a trx 70 or an atc, but im looking into buying a beat trx 90 for 200 bucks

and i was wondering if a regular like gpx motor would fit in it? or what mods do i have for a big bore kit on the honda motor? anybody ever try this...could i put a manual clutch kit on the trx 90 motor? If anyone could help me out, that would be great!

bayman11 · 01-24-2009, 05:52 PM

Call Robb's Racing at 603-231-1692. or check out their website at robbsracingengines.com. They will hook you up.

firepower354 · 01-24-2009, 08:54 PM

BBK's for the TRX90 are limited to about 114cc, without spending a lot. It's the same bore and stroke as the Chinese 86/90cc engines, so the 107-114 top ends bolt on with minor case clearancing. Tak and other good heads bolt on.

Guys make semi-autos by ditching the heavy one-way clutch on the crank for a fixed gear and using the shift lever as a "clutch". You'd swap in a regular 50 type stroker crank.

Lifan 150 swap sounds best/easiest. You can sell the stock engine to cover most of the cost.

Z · 01-24-2009, 09:30 PM

Quote:

Originally Posted by firepower354

Lifan 150 swap sounds best/easiest. You can sell the stock engine to cover most of the cost.

Easiest if you have skills wiring in an electric start engine or have a machinest (or can DIY) to make the pullstart fit on the chinese engine.

A 114 would be much easier then the above for someone without strong mechanical skills.

$200 is a steal for a TRX90. I haven't seen very many of those very cheap these days.

firepower354 · 01-24-2009, 09:45 PM

Less room than it looks for kicking the kickedy thing?

chase 81 · 10-16-2009, 02:22 PM

check out scrminis.com and call scott the number is on there he built the motor on mine

biggyb12 · 10-17-2009, 06:45 AM

dratv sells a pullstart kit for motors with flywheels now so you can ditch the kickstart

tblumer · 10-17-2009, 02:57 PM

Quote:

Originally Posted by biggyb12

dratv sells a pullstart kit for motors with flywheels now so you can ditch the kickstart

I bought that kit for my Lifan 140, works like a charm, starts first pull.

01-24-2009, 05:46 PM	#1 (permalink)
SDGrider531 PM Newbie Join Date: Dec 2008 Location: Pittsburgh, Pennsylvania Posts: 79	Trx 90 mods I know this isnt a trx 70 or an atc, but im looking into buying a beat trx 90 for 200 bucks and i was wondering if a regular like gpx motor would fit in it? or what mods do i have for a big bore kit on the honda motor? anybody ever try this...could i put a manual clutch kit on the trx 90 motor? If anyone could help me out, that would be great!

01-24-2009, 05:52 PM	#2 (permalink)
bayman11 PM Newbie Join Date: Jun 2008 Location: Atlanta Posts: 92	Re: Trx 90 mods Call Robb's Racing at 603-231-1692. or check out their website at robbsracingengines.com. They will hook you up.

01-24-2009, 08:54 PM	#3 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 10,987 My Mood:	Re: Trx 90 mods BBK's for the TRX90 are limited to about 114cc, without spending a lot. It's the same bore and stroke as the Chinese 86/90cc engines, so the 107-114 top ends bolt on with minor case clearancing. Tak and other good heads bolt on. Guys make semi-autos by ditching the heavy one-way clutch on the crank for a fixed gear and using the shift lever as a "clutch". You'd swap in a regular 50 type stroker crank. Lifan 150 swap sounds best/easiest. You can sell the stock engine to cover most of the cost. __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

01-24-2009, 09:45 PM	#5 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 10,987 My Mood:	Re: Trx 90 mods Less room than it looks for kicking the kickedy thing? __________________ If it has my name on it I did it;) FirepowerMinis.com Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Pitster/Piranha/Thumpstar bikes, parts, engines and accessories.

10-16-2009, 02:22 PM	#6 (permalink)
chase 81 PM Newbie Join Date: Oct 2009 Location: AL Posts: 1 My Mood:	Re: Trx 90 mods check out scrminis.com and call scott the number is on there he built the motor on mine

10-17-2009, 06:45 AM	#7 (permalink)
biggyb12 PM Newbie Join Date: Sep 2008 Location: Almond, NY Posts: 88	Re: Trx 90 mods dratv sells a pullstart kit for motors with flywheels now so you can ditch the kickstart

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)