Search the Community
Showing results for tags '78'.
Hello, my name is Nick. I'm a 15 year old who just traded his old, beat-up warrior 350 for a complete, non-running 1978 YZ400. I know enough to know that this is one if the best years of the YZ400. I'm going to do a complete restoration of this bike starting with the engine. It kicks over but has no compression. That being said, it is ridiculously hard to kick over and I hear a grinding sound. I just took the jug off and the piston is old and beat up but looks like it would run. The jug looks good too. The rod is not broken and the crank looks intact as well. Even with the jug off it dosent want to turn over. It looks like I can buy all the parts to rebuild the bottom end. I just dont know where to start. I know I'm gonna have to split the cases but I would like the help of all you people with more experience than me. I'm thinking the bottom end bearings are shot but what do you guys think?
Hello, I recently got a 1978 yz250 from a swap meet in San Diego. The bike was $500 and is almost complete. I plan on going through the entire bike and mechanically restoring it but I want to make it my every day rider because I've fallen in love with vintage bikes. I usually ride a 2000 yz250 but it's just not cool to me. My question is, what all can I do to this bike to pull more power out of it while remaining reliable, and what chassis upgrades/mods can I do to make it perform better where I ride? (a motocross style track built in some trails by my house) I know it's never gonna outperform my newer bike but I just want to see how far I can take it while still keeping it vintage. I'm only 17 so go easy on me 😂 I'm new to this game. I know that I can port the cylinder and do head work as well as a pipe but what about boring the cylinder? Are there aftermarket reeds? What are some suspension swaps I can do? Any input would be greatly appreciated. I'll upload some pics as soon as I get the bike up here to Washington. Thanks!