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PostPosted: Wed Aug 07, 2019 6:31 am 
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To the on ramp

Joined: Sat Jun 28, 2014 1:22 am
Posts: 227
Country: United Kingdom
Bikes owned: T500_MKIII
Grey_Ghost wrote:
akendall1966 wrote:
You can get aftermarket tap complete …….

AK


Thanks for the info! A couple of questions, however...How much of a role does the vacuum diaphragm play in the big picture? Will just using a regular petcock cause issues with flooding/starting/running?


The logic is as long as you got enough gas in the carbs to run once started the inlet vacuum open the tap once you shut off it closes so you don't need to remember to turn the tap on and off, otherwise operation is the same. If the carbs are dry or fuel is low in the tank you need to turn the tap to prime which bypasses the diaphragm. Once started you turn back to on for auto operation.

I run the OEM tap but disabled the diaphragm operation so it acts like the aftermarket manual on / reserve tap. Works fine, not being a daily rider prefer having to remember to turn the gas on over a crankcase full of petrol if the diaphragm and float needle are a little leaky. Once you develop the habit of gas on, ignition on -ride- ignition off, gas off its all good :D


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PostPosted: Thu Aug 08, 2019 7:24 am 
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On the street
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Joined: Mon Apr 10, 2017 1:12 pm
Posts: 38
Country: US
Bikes owned: T500
akendall1966 wrote:
Grey_Ghost wrote:
akendall1966 wrote:
You can get aftermarket tap complete …….

AK


Thanks for the info! A couple of questions, however...How much of a role does the vacuum diaphragm play in the big picture? Will just using a regular petcock cause issues with flooding/starting/running?


The logic is as long as you got enough gas in the carbs to run once started the inlet vacuum open the tap once you shut off it closes so you don't need to remember to turn the tap on and off, otherwise operation is the same. If the carbs are dry or fuel is low in the tank you need to turn the tap to prime which bypasses the diaphragm. Once started you turn back to on for auto operation.

I run the OEM tap but disabled the diaphragm operation so it acts like the aftermarket manual on / reserve tap. Works fine, not being a daily rider prefer having to remember to turn the gas on over a crankcase full of petrol if the diaphragm and float needle are a little leaky. Once you develop the habit of gas on, ignition on -ride- ignition off, gas off its all good :D


Thanks for the info, that makes sense. I am used to the regular "on" when you want fuel and "off" when you're done. I don't know the actual condition of the diaphragm, but I don't want to mess with it if I don't have to. I'll just order up a replacement and call it good.

We have begun the final sanding of the tins and side covers. I have a few more hours of sanding plus some minor filler work and I will be ready to prime and paint. The seat pan is also close to being done. A little bit more filling and shaping and it, too, will be ready for paint. I am farming out the seat upholstery to a local guy who does nice work. Upholstery is one skill I would love to learn to do, just not on this bike. My son appreciates that, too!

Last night we rough assembled the pieces together to get an idea of how the seat will fit as my son is a pretty big kid. I am grateful for the wise counsel from joolstacho early on to not chop up the frame. Keeping the full tail section allowed plenty of seat pan to accommodate my son's larger frame!

Here are a couple of pre-prime/paint mock up shots so you can see how its all fits together currently. For paint color, we settled on black with some red lettering/graphics on the tank (and maybe some minor pin-stripes on tail section/tank).


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PostPosted: Thu Sep 05, 2019 2:22 pm 
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On the street
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Joined: Mon Apr 10, 2017 1:12 pm
Posts: 38
Country: US
Bikes owned: T500
Howdy! Got the bike into primer/paint a couple weeks back. Ran into some adhesion issues on the black color coat on the side covers that have set me back a week or two. I need to re-spray the color and then clear and wetsand before I'm done, but we're definitely getting closer! I'm pretty happy with the tail section shape and size as well as the body work around the new filler neck on the tank.

Built the seat buck and added foam last night. Will finish shaping tonight and deliver to the upholsterer tomorrow.

After those tasks are done, its just a matter of final assembly, double checking electrical and controls, add some fluids, and we're done! My son is worried we won't get it on the road before the season changes, but I'm still optimistic!


Attachments:
Tank 1-1.jpg
Tank 1-1.jpg [ 171.85 KiB | Viewed 84 times ]
File comment: We shaped a notch in the tail section that the tail light nestles up into.
Seat Prime-1.jpg
Seat Prime-1.jpg [ 145.1 KiB | Viewed 84 times ]
Seat 3-1.jpg
Seat 3-1.jpg [ 248.52 KiB | Viewed 84 times ]
Seat 4-1.jpg
Seat 4-1.jpg [ 282.03 KiB | Viewed 84 times ]
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