There is no linkage on the TRX500FE/FM/TE/TM ..If it's new the clutch may not have been adjusted during PDI that would make it shift easier ...This could answer 2 of your questions ..
Yes the Hondas are set lean ,probably because of emissions & fuel mileage ..Honda doesn't have other low speed jets listed for the TRX500TM just the stock #45 ,but if you got the next jet size up then it would idle better in cold weather ..At work we just leave the chokes on till they're warmed up good ..
If you pull on the choke then you see a rubber boot..under the boot is the choke jam-nut ,tighten it a hair with your fingers and this will tighten the choke shaft then it will stay out for you ..
Yes the Hondas are set lean ,probably because of emissions & fuel mileage ..Honda doesn't have other low speed jets listed for the TRX500TM just the stock #45 ,but if you got the next jet size up then it would idle better in cold weather ..At work we just leave the chokes on till they're warmed up good ..
If you pull on the choke then you see a rubber boot..under the boot is the choke jam-nut ,tighten it a hair with your fingers and this will tighten the choke shaft then it will stay out for you ..