XS400 Bobber build/first post

yeah im prob just going to lap the valves and clean out everything else i can in my small engines shop at school. its a deeply mild rebuild. if you know what i maen. im not gonne go crazy on it, just enough to get it running smooth. keeping everything thats good and replacing everything that isnt. lol HT you should do i polishing tutorial...
 
volcomskater77 said:
yeah im prob just going to lap the valves and clean out everything else i can in my small engines shop at school. its a deeply mild rebuild. if you know what i maen. im not gonne go crazy on it, just enough to get it running smooth. keeping everything thats good and replacing everything that isnt. lol HT you should do i polishing tutorial...
Click to expand...
I would, but you guys don't wanna see my Skippi way of doing it. That, and I look like Death when I'm finished....COVERED in black crap! haha I may try to write-up a little something though!
 
anybody know where to get good sized piston rings? or a car size that fits the same? i found NOS ones online but i have nothing to compare price on. there like 20 bucks is that good?
 
yeah ill share the link when i get home. and its for both pistons. it says NOS. so thats a plus i dont know if i wanna share the link tho because its so awesome. lol
there .25mm. is that the right size? it says 1st oversize piston rings to fit the xs400.
 
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volcomskater77 said:
yeah ill share the link when i get home. and its for both pistons. it says NOS. so thats a plus i dont know if i wanna share the link tho because its so awesome. lol
there .25mm. is that the right size? it says 1st oversize piston rings to fit the xs400.
Click to expand...
I'm guessing that if it says 1st oversize, that they are for an overbore application. I may be wrong though..
 
well i can always bore it out. we have the equiptment at school. thats a cylinder hone tho. how hard would it be to bore out and what else would i have to do to it? just new rings right?
 
preatty sure if you rebore the cylinders, your gonna need oversized pistons. set the rings inside the cylinders and check the end gap on the rings. you would want to hone the cylinders if your putting in new rings, but honing is not boreing!

drewpy beat me to it!
 
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damn ok. thanks guys. there goes that idea. on the search again. haha where did you guys get your rings from?
and a new update: i bet my boss $100 that i would have it running in time for our little get together. so now i really gotta get my @$$ in gear. haha
 
Volcom, you have to measure the wear on your cylinders with a fancy bore gauge and then determine if you can get by with standard size rings after honing the cylinders. If you can't, then you have to buy oversize pistons and rings and have the cylinders bored and honed to match.

I'm no engine expert, but that's my understanding. I would just take it to a machine shop that does that type of work and they'll tell you what you need. Then you gotta go try to find the parts.
 
not really. ill be taking in the jugs and the head into skool on wed to clean out and check for wear. should be some updates on wed-friday. depends on when i finish.
where are you getting your rings?
 
not an update, but i learned how to run a lathe today. its pretty fun and i will be posting pics of my progress and how ill be using my knowledge for use on my bike. probably a kicker pedal and some homemade Z-bars. (i gotta knurl them somehow)
 

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