Handy gadget wish I had one back in the seventies n eighties when I used to play with a my. Z1 900 and later my xs 750 triple used to be pain holding everything place till you got the tensioner back in after doing some internal work, 9 times out of 10 you would be 1 tooth out so you would have to line it all up again. Two strokes were so much more fun to hot up, just go to town in the ports add a booster port to back of piston, add a bigger bore carbie and a Whispering Smith expansion chamber and hang on