Thread: 34cc domes in a NPV 1200?
03-28-2013, 12:37 AM #1
- Join Date
- Jun 2010
- GTA , Canada
34cc domes in a NPV 1200?
Got this head used, domes have "34" stamped in them. It is a Greater head. I assume these are 34cc? Safe to run on a 1200 with 92 octane pump fuel and a riva enhancer? Going in a freestyle ski so it won't see much extended WOT use. Thanks!
03-29-2013, 10:26 AM #2
I'm guessing a 34cc head on a 1200 65u would put the compression in the 170+ range. Great for race fuel. I believe for a pump gas 65u you should be around 40cc.
04-05-2013, 04:27 PM #3
170-175 PSI....way outside of 93 range....more so with advanced timming. I would not run over 160's on pump fuel....although short bursts you may have....you will also have the pump out of water a lot making a ton of heat...adding to Detno problems....
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By cmherrera in forum Yamaha ClassifiedsReplies: 1Last Post: 10-25-2008, 12:21 AM
By polaris_man in forum Yamaha Old School SkisReplies: 10Last Post: 08-05-2008, 11:49 AM
By polaris_man in forum Yamaha PWC Performance (2-stroke)Replies: 0Last Post: 07-07-2008, 12:13 AM
By krivashulk in forum Yamaha Old School SkisReplies: 11Last Post: 05-29-2008, 04:20 PM
By OzVirage in forum Polaris Open DiscussionReplies: 7Last Post: 02-15-2007, 12:27 PM