Thread: 750 cases on a 785
09-11-2009, 10:17 AM #1
750 cases on a 785
The cases in my 785 are junk, can I use 750 cases that I already have? I compared them to eachother on the bench and the only difference I see is a second pulse fitting in the 785. Does anyone know of a reason why I shouldn't drill out an additional pulse fitting and use the 750 cases?
09-11-2009, 10:45 AM #2
i think the porting at the top is different too! adding a pulse line wouldnt be that bad to do, but the porting is harder and it's easy to break through the case walls
09-11-2009, 10:55 AM #3
You can use the 750 cases however, they do not have the same porting as the 750/780 cases. You will be down a little on HP. You can however, come close to matching the original 785 case porting if you want to do a little work to the 650/750 cases. With the proper tools, you can nearly duplicate the 785 porting. I say "nearly" because without doing a little welding to the 750 cases, there will not be enough material to to exactly match the 785 porting without going through the case. I weld them then port the case and your ready to go. However, it might not be worth the effort and expense unless you can do the work yourself.
09-11-2009, 11:54 AM #4
I think I can save the top case, will this work with 785 top case and 750 bottom case?
09-11-2009, 01:05 PM #5
- Join Date
- Aug 2006
- Pittsfield, MA
09-11-2009, 01:26 PM #6
Its never a good idea to mix and match case half's..
09-11-2009, 07:10 PM #7
09-11-2009, 07:20 PM #8
thanks for the advice, I did put the 785 top on the 750 bottom and it looks fine. The crank spins nice, but i may try using the 785 bottom if i can get it cleaned up good enough. I will post some pics tomorrow and you guys can tell me what you think. thanks for all of your input
09-12-2009, 10:44 AM #9
ok here are some pics, how should I clean them or should I even bother?
09-12-2009, 10:53 AM #10
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By khemenway in forum Polaris ProjectsReplies: 1Last Post: 06-09-2013, 09:18 PM
By fixer in forum Polaris Open DiscussionReplies: 2Last Post: 05-27-2011, 02:08 PM
By tosborn55 in forum Polaris Open DiscussionReplies: 4Last Post: 07-12-2010, 10:59 PM
By BigDaddyPT in forum Kawasaki Open DiscussionReplies: 0Last Post: 05-25-2008, 09:48 PM
By wedoseadoo in forum Kawasaki PWC Performance (2-stroke)Replies: 7Last Post: 09-16-2006, 10:20 AM