hello all, so i recently purchased a 1982 xl500r. i am a big fan of these old thumpers. the one that i had purchased looks to have a rear shock of a later model. i have come to figure this out because it has a reservoir attached to it. also, i removed it to do some cleaning and an overall run through of the bikes condition. now here is my problem. i can not get the shock back into the bike.. any suggestions? it seems to be about an inch too high to get it into the correct location.. any ideas or suggestions would be greatly appreciated. do i need to compress the spring in order to shorten the shock temporarily to get it in? i look forward to your advice!