1981 Yamaha SR250 Cafe Racer

Hey,
Here's an update ..
I will post a pic of the wiring diagram Chris and I drew up (well mostly Chris with his planet sized brain) but basically to run the main loom to the front I just worked out how many active (ie positive feeds) to the front of the bike I needed .. two for the indicators, one for low and high beam, a couple of grounds for the headlight and ignition, a fat active for the coil, another feed for the instrument lights and some for the switchgear etc and ran a different colour wire for each which I sheathed up in PVC sheathing. Always do your lengths longer than you think you'll need because you can always trim it down after.

Here's a shot of it layed out on the kitchen bench ..

n704951495_1702893_7047.jpg


Now getting it through the sheath is the next tricky bit .. so here's a shot of the coat hang.. ahem special tool I made to pull them through. I cable tie the wires together, then fold one over and cable tie it so there's a loop and use my "special tool" with a hook on the end, drop that through the sheath then pull it through. Here's a pic to give you an idea ..

n704951495_1702892_6681.jpg


Now I've layed that down the spine and onto the rear subframe tube between the components box and the headlight and cable tied it .. sitting underneath the tank and under the seat at the rear so it will be almost invisble with them on. Note the shiny new stainless fasteners in my triple clamps!

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My battery/starter leads leads run along the sheath and are also out of view .. there wasn't quite enough room to squeeze them into the 20mm sheath I wanted to use. As well as earthing to the engine block I have earthed the battery's negative terminal to the frame as well to ensure a good earth as the coil earths to the frame.

n704951495_1702894_7390.jpg


As you know I've been working on the components box for a while and I have the layout with my relays, circuit breaker and flasher unit finalised now .. I think it looks pretty neat and there is just enough clearance for the fuse box to sink in behind them with the lid on. Sweeeeeeeeeet.

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This is my sexy new ignition key .. I will get my tank cap rekeyed to suit ..

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That's all for now .. the wiring continues ..

Regards,
Ben
 
Here's a pic of the kick start parts installed. I forgot to take before pics but Ben has a good shot or two back on page 4 of this thread.

kickstartinners.jpg
 
thomen said:
so does the kick go left to right not up and down to start?

wow you did a neat job!


The kick lever pivots out and you kick down and back on it just like any other kick start.
 
Hey ..
More progress on the wiring today. I finished relocating the key to the frame bracing just beside the tank.

n704951495_1738199_1308.jpg


I got a lot more work done than that this afternoon but running wires doesn't make for great photo's .. but I also made a cool milk crate bike lift out of milk crates, a bit of MDF, some offcuts of skirting board and carpet, self tappers and cable ties. Someone on the forum gave me the idea..

n704951495_1738198_833.jpg


It works great, is very stable and gets everything off the ground a bit..

Regards,
Ben
 
Hey,
Here's a secret I've been keeping .. my instrument panel .. which I wanted to do something special for .. I've been planning this for a few days. I started off by worlking out the dimensions I had around the triple clamps on the bike, worked out the lay out I wanted of the gauge, indicators and idiot lights, drew a template to work out how much room they would take up, and set to work free hand drawing a spade. I didn't want to use something out of a book as I want everything on this bike to be mine.. so the drawings began.

n704951495_1741589_779.jpg


Then I cut it out in aluminium .. using a 5 inch grinder because I couldn't find my jig saw, and shaping it with a round and flat file .. a half round would've been handy but I can't find mine. Came up nice!

n704951495_1741574_5993.jpg


Then I used my template to centre punch and drill the holes for the lights .. I need a good hole saw to cut the hole for the speedo out.

n704951495_1741575_6615.jpg


Here's a pic of the speedo I plan on using ..

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I bent up a rectangular box to cover the electronics on the back .. I'll need to notch it to clear the gauge (when I get it) but it looks good.

n704951495_1741576_7146.jpg


Here's a photo of how it looks on the bike .. for some reason the camera makes it look a bit big, but it looks in proportion. I like it .. I will make another version thats more conventional as I predict I may have trouble with registering the bike with it on, but it'll be easy to swap over if I want to show the bike.

n704951495_1741590_268.jpg


What do you guys think?
 
Hey,
Today I reshaped the spade a bit to make it more rounded and squat .. and decided to add some depth by creating another spade, and stacking it on top of the other. I'll be able to hide the wiring in the middle around the gauge so that simplifies things some what too.

The top plate will be black to contrast against the chrome gauge and LED bezels, and the bottom will be polished.

Check it out :

n704951495_1745092_7714.jpg


And a view from the side :

n704951495_1745093_8236.jpg


Woo! I dig it!
 
love your work!! it's looking so good!

so did you drill a hole in the subframe to mount the key?

could you ping me a copy of chris's wiring loom.. i was going to get an sr250 and do a battery relocation like yours so i could add a pod air filter in the area where the covers are!

cheers,
Tom
 
The SR has plates welded either side of the junction between the spine and the down tube, I drilled a 19mm hole in one of these and managed to squeeze the ignition barrel in, I had to pre-wire it as the original setup had spade terminals hanging off which didn't fit in the space. Everything must be modified.. sigh..


I'm hesitant to supply a copy of the actual wiring loom as the Yamaha charging system without the stator etc and wiring colours / runs and the way we have set everything up on my bike will differ slightly from bike to bike, and I don't want to be seen as responsible for people taking it as gospel and damaging their CDI's or whatever. I'm working on a thread with wiring tips when I get time.
 
no worries i understand re the wiring! love the key idea!!

do you know the size difference of the sr400 vs the sr200? ie the length, seat height etc.. i could find the sr400 specs easily but not the 250s and was wondering the difference as im 6ft and didn't want to dwarf the 250!
here's the sr400's dimensions

Dimensions
Overall Height1105 mm (43.5 inches)
Overall Width750 mm (29.5 inches)
Overall length2085 mm (82.1 inches)
Seat height790 mm (31.1 inches)
Wheelbase1410 mm (55.5 inches)
Ground clearance140 mm (5.5 inches)
Fuel capacity - reserve12 l (3.2 gallon US)
Dry weight152 kg (335.1 pounds)
General
CategoryCruiser
ModelSR 400

cheers,
Tom
 
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