Your Montesa dealer is talking absolute rubbish in an attempt to sell you a 4RT i'm afraid. 2 stroke trials bikes can literally go for years without needing even piston rings. My advice would be to try a few bikes to see which one suits you, then buy one of those. After all, you want a bike which you enjoy riding first & foremost.
Tongue in cheek response Hughie, no offence meant. You have at the moment the perfect bike to learn the sport & progress through the levels, you should concentrate on riding & improving your technique on this bike for a while in my opinion. Getting lessons from someone like Alexz is an excellent idea as this will will steer you away from any bad habits which you may be picking up (as everyone does)
Bike choice, particularly trials bikes are a very personal choice, you really must try all the bikes before purchasing. Some people really love twinshocks or air cooled monos, but equally i know of more than a few who have splashed out on their "dream" bike only to find it bloody horrible to ride (for them). More time on the bike, then even more time is the priority here.
Agree with ChrisCH, you're over thinking it. Ride the REV3 until you have improved your skills. Then start riding other bikes until you find one that you really like, and feels right, then buy one of those.
I had a 2013 evo with clutch drag that got worse the hotter it got, cleaned the glue from the plates, switched to nano-trans no different. Only got better when i installed a whole new clutch from an old Techno engine that was lying around the garage.
Good effort for making it & trying it out, but like I said before you need your thumb on the bars for grip, not operating a switch. Do post another video if you make a modified version👍
You may think four strokes are quieter but not so. Four strokes may sound quieter but in fact the noise travels further, this certainly affected mx practice tracks when 4 stroke popularity was increasing a few years ago now.
Aprilia Climber 280 Help
in Aprilia
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As above, its a 1990.