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Woke up Sunday morning to the smell of gasoline in the house! Checked out the 5 bikes in the garage - yep, the Seca 400 tank was weeping from "the usual" spot - one of the low points on the right side. Sigh. Just enough to wet the cylinder & head fins and oooze down the front of the...

A friend of mine recently taught me how to make my own seat pad for my xs400, i thought i would share what i learned First i would like to say, if you are even thinking about attempting this, let me assure you, it is much easier than you think! With the right tools(not hard to get or...

So for my 1979 XS400 i decided i wanted to do a custom seat, the stock seat is just not my thing. I am going for something like this http://4.bp.blogspot.com/-s92RB60J6TI/Te9MMsmc1bI/AAAAAAAAF5o/Ob0U0iO8psI/s1600/YS2B4254%2Bcopy.jpg For this i would need to bend some pipe for the curve. I...

Somewhere on the Global Intraweb I saw a write up of a how to on drilling a sprocket cover for the xs400. I swear to God I have done every type of search on here, bing, google, yahoo and the neighbor down the street trying to find it again. (Mental note - bookmark things that look interesting)...

Hi, first post Just purchased a 80 xs400, was running on one cylinder .. adjusted balance and got it running on both ... but was rich on one still adjustd idle mixture still was rich .. took carbs apart.. main jet had fallen out and was sitting in bowl ... and was missing air jet in carb...

i have a snapped ring on one piston, being that the stock rings are so hard to come by, if i use 1st over rings will i need a larger piston also .. or will they work with stock pistons i know that on 3rd over you need the larger sized pistons which are 60 bucks a pop. thanks

Any time I have transported a bike in my pickup truck in the past I have stuck the front wheel up against the front of the truck box, tied the handle bars crossways to the truck tie downs, tied the front wheel so it won't kick out sideways, and put two ties on the rear for good measure. I have...

Hey guys, I've got two carb kits coming in for my Mikuni BS34s that go in my 78 XS 400. I'm going to rebuild them, which is something I've never done. What am I going to need with me when I begin? Thanks!

I've got my side covers stripped and painted and would like to clean up the tank by removing the Yamaha logos. Been looking for some kind of different trim or decals to cover the area. I've thought about trying to just fill and spot paint the area but not sure how it would turn out. Believe...

Hey all, I got a '78 XS 400 and I love it. (I'll post some pics soon). I have done virtually nothing to since buying it (last weekend). However, I got it home and tried to start the bike but since it was drained of gas I went and got some in a gas can to bring it back. While I was gone (a...

Hello. Thanks for the site. I have a '79 xs400. I bought it last summer and runs great. However, this spring, the inatke boots (a littel cracked last year) are now puffing out air. The cracks have obviously broken all the way through. Hs anyone had any success repairing these? I read on...

Before you read this, know this this is for someone who wants to split the crankcase without dissasembling the entire engine. Example: A cracked kickstart shaft journal that is laying around and bouncing in the block, but the engine runs fine. If i miss anything or provide false information...

Hello my name is Katey. I am thinking of getting an xs400 for my first bike it is an 82 and it's 400 bucks. Are there any problems known about 82s or anything I should look for when checking out the bike.

im planning on hardtailing my 400 and since its got that double backbone, i cant use a normal universal kit, and PSW is expensive. so who has pictures and explanations of ways to do it? whether it be a plate or going right to the to tubes where the swing arm mounts, im open to anything and even...