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Hey all, I have been letting my 1978 XS400 sit for a couple years and thought I need to get it up and running before the weather turns too cold :). It probably already runs (will find out soon when I get my new battery), but I do like to give myself a little project each year to upgrade the...

I've always measured float level with my electric caliper correctly based on reading many threads here (making sure to measure it from the inside of the carb where the gasket is placed as recommended here ), but I thought I'd grab this tool I saw a couple others on the forums got or made to see...

The Crimson Revenger!!! (XS750 tank on XS400) Finally got the XS750 tank on. Here is how she looks be4 I rode her around today:

So i see some nice cafe fenders on Benjie's Cafe Racer website: http://www.benjiescaferacer.com/fender-covers.php But he said those are mostly for Hondas and XS650 and he wasnt sure they'd fit a XS400. Anyone know a nice blacked out and simple/short cafe fender like that, which fits our...

so I noticed the carb clamps on the engine side (not the airbox side), are thicker and the carb mounting rubbers has a lil indentation space to fit a nice thicker clamp. I bought these from MikesXS, they work, but they are too thin so would like to replace. 2 x Band Clamp - BS34 Carb Holders...

Hey guys, My bike runs pretty well (1978 XS400E, basically stock but with 2-in-1 pipes)... But I feel like in the low end (1st-2nd gear) there is not much power. If feel like I go through the gears pretty quickly to get at 25-30mph (prob @ 6th gear when I hit 30mph). Usually I like to cruise at...

Hey all, I could have sworn I cleaned and setup my carbs perfectly this winter (no leaks last year). I put them on and noticed one small drip of gas on the bottom float drain bowl screw. Like maybe 1 to 3 droplets of carb leak overnight I'm guessing. I disconnected my tank as well to rule out...

Just wanted to rant somewhere... Is it just me or MikesXS shipping costs are getting super high. I'm trying to buy this part $2.95: http://www.mikesxs.net/product/20-6419.html and i noticed the shipping cost is the same as a flat carb bowl gasket I bought last week ... $11! in addition to...

Just curious, for your pilot jets... do you use some sort of anti-seize so it doesn't get stuck/binded in there? If so, which one can I grab at local autobody shop? Also are there any good Mikuni carb toolkits that include the appropriate size JIS screwdriver for that hole that the pilot jet...

So my mechanic friend rushed me to get my headlight bucket out so I didn't have time to label some of the wires. Having a little difficulty matching up the wires via the Electronic Diagram in the back of the manual (I have an 1978 XS400E) if anyone can help match the leftover wire inputs to the...

Stock Tank or XS750 tank? Which one you guys like more? I like the indents on the XS750 tank, but the black stock tank looks so cool too. Blah, maybe I'll find another XS750 tank and paint it flat black to make it more badass looking. Eventually will get a smaller seat I think.

The time has come when the arm of the XS400 centerstand broke (a common problem reading the boards here). Seems like Yamaha used cheap tubing metal for it. Is there any good replacements that are more sturdy? I see MikesXS offers an XS650 one but skeptical that it would fit on the XS400...

I am pretty sure i read in this forum that the mag wheels (the one with 7 stars shaped pattern) are NOT tubeless before 1980. Just wanted to confirm. Think someone else mentioned you can run tubeless tires, but still need the tubes underneath them. Whats the consequences of running...

So redoing the front end with my friend, and I see my MikeXS #29-3522 brake pads that i bought years ago match the ones in my 1978 XS400E. yay... but i realized while taking off the old brake pads, I lost one of the thin metal things that goes along with the pads (think there was one on the back...

Hey all, I need to replace my rear wheel bearings I heard from my friend. We already re-did the front end and I got a pair of AllBalls sealed bearings for the front (believe i got these: http://www.amazon.com/All-Balls-Wheel-Bearing-25-1311/dp/B000UK9JNE)... Is there a matching All Balls...

Just thought I'd start thinking longterm and replace with a more stock/metal tank. 4 years old and I thought the inside is starting to look not as clean as I'd like inside of tank to look like. No clogging issues or leaks from tank itself, but the NPT 1/4" petcock might need replacement (or a...

Trying to decide on what classic looking tire would fit my bike better (1978 XS400E).... But its kinda confusing cause i see different sizes... So i see in my Haynes/Clymer manuals different sizes: Haynes: front: 3.5in x 18in Back: 3.5in x 18in Clymer: front: 3.25in x 18in back: 3.5in x...

Hey all, I realized this week i have an extra set of BS34 carbs so why not restore them (from an 80/81 XS400 it looks like)... I need a couple brass floats in good condition (the old extra ones I have either have pinholes or are dented and I dont trust them). Just curious if anyone has a good...

I have a pair of carbs from my 1978 XS400 (assume they are 1978) and one that came with a 80/81 XS400 engine (not sure they are from 80/81 but they do look very very similar to 1978 one minus some differences highlighted in the video below). I am going to follow JBM's instructions to replace...

hey all, Just curious. I have a 1978 XS400 and I had the mounting studs moved/re-welded for a fiberglass gas tank a while back. The guy put the 'tank studs' on the gas tank for an XS650 so the 'frame studs' had to get moved as well (hopefully using the terminology correctly). I was curious...