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Author Topic: '73 CB250 - Doing it right this time round.  (Read 104385 times)

Offline Maritime

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Re: '73 CB250 - Doing it right this time round.
« Reply #580 on: Apr 07, 2017, 11:47:36 »
Yep, you can make an oven with some wood and insulation and a couple light bulbs. Just need a thermometer and a vent to adjust the heat.  The paint doesn't need high heat, most are 200-250 deg F and they will cure.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline Green199

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Re: '73 CB250 - Doing it right this time round.
« Reply #581 on: Apr 07, 2017, 12:04:31 »
sweet. That sounds like a plan.

I'll probably do a recoat on the motor too as there's some bits which need to be touched up, but at the minute I need to stop pissing around and get her on the road haha.
1973 CB250 'Doing it right this time round' - http://www.dotheton.com/forum/index.php?topic=36795.0

Offline Green199

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Re: '73 CB250 - Doing it right this time round.
« Reply #582 on: May 12, 2017, 08:09:10 »
2 weeks to the Bike Shed show and I still haven't got around to finishing it yet. I sat my last Masters exam on Wednesday (hopefully no more ever haha), and just need to crack on with my Thesis now so I am hoping I can get most of the loose ends tidied up this weekend, or at worst case next weekend.

Just got the line-up for the show released too. It's pretty damn cool to see my name alongside the likes of Shinya Kimura, DeBolex and the likes of FCR and Foundry motorcycles.
1973 CB250 'Doing it right this time round' - http://www.dotheton.com/forum/index.php?topic=36795.0

Offline Maritime

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Re: '73 CB250 - Doing it right this time round.
« Reply #583 on: May 12, 2017, 08:39:16 »
Nice, you'll get her done.  good luck on the thesis.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline Green199

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Re: '73 CB250 - Doing it right this time round.
« Reply #584 on: May 12, 2017, 08:52:46 »
Nice, you'll get her done.  good luck on the thesis.

Thanks mate!
1973 CB250 'Doing it right this time round' - http://www.dotheton.com/forum/index.php?topic=36795.0

Offline scott_jangers

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Re: '73 CB250 - Doing it right this time round.
« Reply #585 on: May 17, 2017, 03:02:07 »
Hey Green199, I've got my hands on a K4 with a really skanky pair of 725b carbs. I'm going to have to clean them up pretty thoroughly and order a pair of rebuild kits from Silvers but i'm also missing the air cleaners. The plans to run them with something aftermarket, so was wondering how you got on with jetting and tuning with your stack exhaust combo? Are you running the stock jet sizes?

Plus, seen your bike over at the bikes shed forum too, but bit quiet over there of late. Good luck getting it ready for next weekend. I'll come over and say hi...!

Offline Green199

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Re: '73 CB250 - Doing it right this time round.
« Reply #586 on: May 17, 2017, 06:03:02 »
Hi mate, yeah come and introduce yourself at the show!

At the minute I still just have a few things left to do with the loom before going for some proper runs to check the tuning. I have stock jetting and she idles ok, but no proper distance under power yet. I'll let you know when she's finished up (hopefully before the show! haha).
1973 CB250 'Doing it right this time round' - http://www.dotheton.com/forum/index.php?topic=36795.0

Offline scott_jangers

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Re: '73 CB250 - Doing it right this time round.
« Reply #587 on: May 17, 2017, 10:45:22 »
Seems to be very little info on anything 250. I guess it wasn't big in the States as there's loads more for the 350. Maybe brits are just restoring them and not customising. Mine is missing side covers, air filters and the filter housings, and it'll be hard and expensive to track them down, so it feels like a perfect donor for a custom build!

At present I'm gonna do the same as you, but if mods look hard to do with the 725b, I may have to save up for the mikuni's.

Anyway, I find having a deadline to work to sometimes energises you to get stuff done, so sure you'll get it all sorted in time. Chuffed for you that they wisely saw fit to include a true shed build in the show. See you then!

Offline Green199

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Re: '73 CB250 - Doing it right this time round.
« Reply #588 on: May 19, 2017, 07:39:45 »
Seems to be very little info on anything 250. I guess it wasn't big in the States as there's loads more for the 350. Maybe brits are just restoring them and not customising. Mine is missing side covers, air filters and the filter housings, and it'll be hard and expensive to track them down, so it feels like a perfect donor for a custom build!

At present I'm gonna do the same as you, but if mods look hard to do with the 725b, I may have to save up for the mikuni's.

Anyway, I find having a deadline to work to sometimes energises you to get stuff done, so sure you'll get it all sorted in time. Chuffed for you that they wisely saw fit to include a true shed build in the show. See you then!

It's also tough finding information about the 725B's. I even contacted David Silver and they just told me that the specs 'should' be the same as other models found on the 250, like the 722A or I think 726?? Would have loved to put some flatslides on to aid in tuning etc. Maybe in future.

Was exactly the same boat as mine. Would have liked to restore it but it was already a hack job to begin with so went down this route.

I managed to basically complete the wiring loom last night, so on Saturday I'll wrap and install it, and hopefully get a nice video to show.
1973 CB250 'Doing it right this time round' - http://www.dotheton.com/forum/index.php?topic=36795.0

Offline scott_jangers

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Re: '73 CB250 - Doing it right this time round.
« Reply #589 on: May 21, 2017, 03:49:06 »
Just curious but did you ever set the float levels? The Clymer and Haynes manuals both have 19mm but I've read a couple of threads where the preference has been 25 or 26mm.

Good luck with the loom and getting it started  :)