Thread: Head Porn (cylinder)
01-03-2011, 10:02 AM #1
Head Porn (cylinder)
Took pictures through the porting process this last weekend. Have a brand new SHO head that i am porting and prepping..
The factory ports themselves are nice, not much to be done except clean and polish, but the chambers are absolutely horrible, some of the worst ive ever seen.
Razor sharp lips/edges in the chambers surround both intake and exhaust valves where the aluminum was bored and the stellite valve seat was installed.. Edges are .030-.040 tall which will dramatically hurt airflow.
Look close on the pics of the uncut head and you can easily see them.
Before and after pics..
01-03-2011, 10:08 AM #2
01-03-2011, 10:13 AM #3
01-03-2011, 10:19 AM #4
I use RTV silicone to stick an old head gasket to the flat side of the head for protection while porting it..
01-03-2011, 10:29 AM #5
01-03-2011, 10:40 AM #6
- Join Date
- Jul 2005
- Central North Carolina
Looooking good, Ross
01-03-2011, 01:16 PM #7
01-03-2011, 02:57 PM #8
- Join Date
- Oct 2006
- melrose ma
what would be the cost of something like this?
01-03-2011, 04:47 PM #9
It depends on what you have and what you want done.. Please PM me if your interested.
01-03-2011, 06:04 PM #10
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By Shawn001ca in forum Polaris Open DiscussionReplies: 0Last Post: 07-21-2008, 03:25 PM
By lousieg55 in forum Yamaha ClassifiedsReplies: 5Last Post: 06-04-2008, 11:17 AM
By wsuwrhr in forum Yamaha PWC Performance (2-stroke)Replies: 45Last Post: 04-29-2008, 05:10 PM
By JimC in forum 4-Tec PerformanceReplies: 1Last Post: 04-17-2008, 05:05 PM
By BR549 in forum Yamaha PWC Performance (2-stroke)Replies: 4Last Post: 02-10-2008, 10:39 AM