This is a discussion on 660 Compression within the Grizzly Engine & Transmission forums, part of the Grizzly Forums category; Hi i am new to the site as well as the grizzly. I just purchased an 02 660. I am going through all of the ...
Hi i am new to the site as well as the grizzly. I just purchased an 02 660. I am going through all of the normal engine maintenance. I have ordered the manual but have a hard time waiting for things. I did a compression test tonight and found what i think is rather low. 90psi. Does anyone know what the 660 should get new? Also if anyone has any sugestions on things that need looked after more than other machines please let me know.
Thanks, i talked to one of the service guys at yamaha today and he said he thought it was around 100. I know it is not 150. if it was that hi you would need a lot higher of an octane rating than you can buy at the pump.
Mike has got it right, I just verified it with my service manual.
2002 Camo Grizzly 660
25" DD2 on Douglas Rhythm Wheels
Ricochet Skid Plates & Rock Sliders
Superwinch ATV2300 w/Amsteel Blue
Mad Mike Clutch Mods 2 & 3 w/orange 2ndary spring
Plano Rear Box
Rotopax Fuel Pack
Tomahawk Front Bumber w/Rigid D2's
2009 Rhino 700 Black Special Edition
27in Sedona Rip Saw on ITP Black SS108 Wheels
Viper Max 4000 w/Amsteel Blue
Yoshimura RS-8 Muffler, K&N Filter, EZ Steer Power Steering
J Strong Roof w/lights & stereo
J Strong Full Windshield
J Strong Front & Rear Bumpers
J Strong Dual Battery Isolator
US Govt survey shows three out of four people make up 75% of the total population.
GrizzlyCentral.com is not associated with Yamaha in any way. We are an enthusiast site dedicated to the Yamaha Grizzly ATV. Our goal is to offer a place for Grizzly owners to discuss rides, events, mods, maintenance, purchasing, etc and offer help and assistance.Contact Us -
Yamaha Grizzly ATV Forum -
Privacy Statement -