Not sure why but this reminded me of the time I built my old 400EX engine.
So anyways I did an 89mm Big Bore High Compression Piston, Ported Head, +1 Valves, Stage 2 Hot cam, 450R Carb all kinds of fun parts in it. So I finally finished it up took me a couple weeks. So Finally one morning I started it, let it warm up, took it out for a test ride ran great and then stalled I thought it was weird so I started it again and it fired right back up... stalled again about 500 feet down the road, and (as I thought some really bad pre detonation) because I was running regular 91 in it with the 12:5.1 compression and know how the 400EX's are finicky with high compression... So I changed the fuel to a VP100, still did it... Weird thing was it always would fire right back up, so I finally was thinking and thinking sitting in my shop after messing with it and it always would fire up and run great... and I seen this little gear sitting on my bench I was like NO!! I pulled the clutch cover off and... Yupp it was the Oil Pump Drive gear!
Luckily Just had to replace the Piston and Cylinder! The funny part is that I guess when I orderd the Piston for the quad from Wiseco in the first place that they accidentally sent me a 2nd Piston. I noticed the day after when I tore my engine back apart and discovered the piston and Cylinder were scored up I seen another package on my porch and I was confused because I was like "What else did I order?" Opened it up and it was another brand new piston! What are the odds? lol! I found another Cylinder and gaskets that night and orderd it and with in that week it was ready to go again haha. I'm a very honest guy but I said what the ****! I never even told them that they sent me 2 pistons.
Build Break Rebuild Better
Last edited by Ryan94Wright; 02-20-2019 at 04:45 AM.