Thread: Finally working on a Fuji 750
07-09-2008, 02:59 PM #1
Finally working on a Fuji 750
A friend of a friend is having a problem with his 94 750. Only has 60hrs on it (according to the display) and is in very good shape. Sounds like he took out the MAG cylinder. My guess is the whole fuel pump thing. Going to order parts for the pump and lines, etc. I also need an OS piston. Not sure how far yet. Thinking of going with a WSM piston, as he wants to keep the costs down. Whats the deal with the head gaskets? Are WSM ones ok? Do they need a sealer on them? Everything else I've worked on has used O rings for the heads. Any other tips or advice on this specific model and year? Going to do the obvious and check all filters and lines, etc for crud buildup.
07-09-2008, 03:05 PM #2
I would use OEM head gaskets. Smear some grease on them and you will be fine. Some peeps use copper coat..
07-09-2008, 03:22 PM #3
- Join Date
- Oct 2006
- Cleveland OH
Dicks of grand lakes on Ebay (stores section) has stock head gaskets for $10 ea or best offer.
No sealer for them. I only use copper spray when I re-use them.
Watch for restrictor in return line when replacing the return hose.
Other than that pretty simple...
07-09-2008, 03:29 PM #4
WELCOME to the dark side of Polaris nut!!
07-09-2008, 05:48 PM #5
07-09-2008, 11:37 PM #6
07-10-2008, 09:34 AM #7
07-11-2008, 08:22 AM #8
Found the PTO cylinder to be toast. Other two cylinders had 135# compression. Tried getting the carbs apart to check for blockage, but those jet block screws must be welded in...Mikuni must put those in with air tools, because I always have a hard time getting them out for the first time without completely destroying them. An impact driver seems to do the trick. Will post a few pics tonight
07-11-2008, 08:26 AM #9
Harbor Freight has a 1/4 drive impact driver, works excellent for the jet block...actually it works great for all the carb screws.
07-11-2008, 06:30 PM #10
A few pics
You can see the piston had decent wash...The fuel starvation had to happen fairly quickly. It's black because the engine was run for another 15 min after it holed the piston.
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