Yes i know how to double clutch but i havent tried that. All of the other gears will go in and out with out using the cluth if at the right rpm. Do you think trying it on the center stand will tell me anything. And now i went out and my rear tire is flat, spring is starting out rough.
Trying it on the center stand won't tell you anything....
Matching input shaft speed to output shaft speed is important with this bike to get 'clean' shifts. That throttle blip on the down shift will allow the bike to snick into a lower gear with a lot less force on the shifter. sounds like you know how to do that...... Knowing 1st will get you all the way to 50+ MPH at max RPM, what speed and RPM are you attempting to down shift to first, when this problem occurs?
If the bike has sat around enough to get a flat, you really need to do the lubrication of the shifter linkage. Each point that moves should be as free moving as possible.
Can't remember if it was this thread or another; someone mentioned the shifter 'throw' as being different between 1-2 and 2-3,3-4, etc. Near as I remember, that's not the case. Neutral is a half step, between 1st and 2nd.
The shifter only goes through one motion, and has to reset to a rest at a mid point, between shifts. If the linkage is dirty, and there is any binding it may not come back to that rest position quickly enough.
Proper slack in the chain is important to shift quality..... with the bike on the center stand, you should be able to push the lower run of chain up to almost making contact with the swing arm.
The other possibility is that you have a bent shifter fork, or a bent 'dog' on 1st gear. Either one would require opening up the transmission to repair.... so I'm hoping that this is not the case.
I know this is a low mileage bike, and shouldn't be having that sort of difficulty. Do you know if the previous owner changed the sprockets and chain? Trying to figure out what may be contributing.... I seriously hope it';s nothing more than you needing to master the shift technique required by this bike. Much cheaper that way.... :thumbup: