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15% scruffmcgruff is the code

I'm having one of those moments when I realize I don't know the question to ask, much less the answer. I gotta acquire a rear sprocket for my RD350B project, but how many teeth (OK, I knew that question)?
The known values:
'75 RD350 primary gears
'76 RD400 transmission
520 chain
TDR250 rear hub, same sprocket as FZR400 (520)
The 400 countershaft is the same spline and size as my RZ and TZ, so I have a couple of front sprockets to play with, but I have to buy a rear. Is there a way to make an educated guess, or have I entered the realm of the experimental?

That got your attention! I talked myself into painting my RD350 cylinders before assembling the top end...and then looked at them closely. They're going to be awful to media blast with all the deep crevices between fins and such. Is there a better, perhaps chemical way to strip these things prior to painting? 

The short version is: can anyone give me a reason NOT to order a set of Lomas street racers from Economy for my '75 RD350 (Ritter-massaged cylinders and heads, HPI iggy, 28mm PWKs and RD400 transmission)?
I know, I take forever to decide these things 

Not mine:

https://www.ebay.com/itm/203686844280

Kinda beat up, so it's accuracy may be questionable. Neat collector's item, though.

I'm looking at the Central Tools 6491 timing gauge set as sold by Economy; is it the diameter of the dial itself that allows it to be used on an RD engine that is in the frame?

15% off use code "hamtaro" sale ends Tuesday 11/30/2021

Get on it!

Not mine:

https://www.ebay.com/itm/384506371673

What are these? Spent a bunch of time in the identification thread and still think maybe Bassani? I'm not looking to buy 'em, just want to know what they are.

Russ Bigley posted this over on NATS:

http://www.natsforum.net/viewtopic.php?f=14&t=1868

I put the RD350 bottom end together (6 speeds present and everything turns freely and smoothly) and found my right side crankshaft O-ring 360-11526-00-00, the goofy one:



is crap. Economy is out of stock, CMS has a reproduction in the Netherlands and there are a few on eBay for $60-70. Couldn't find it at any retail site, HVC or FFTP. Anybody know of a better source than I've found?

But of course you did. Everyone knew but me...again. Norbo has parts for air-cooled RDs! Not a lot, but good-lookin' stuff:

https://www.rdlccrazy.co.uk/html/A%20C%20for%20sale.html

https://slipstreamcycle.com/products/yamaha-rd250-rd350-rearsets

Just got the email: Use sale code "scaryscooter" to get 15% off your order total!

Time to grab an HPI ignition or some other goodies. What a crazy cool site.

Does anyone have experience with or knowledge of these pipes?

https://patriotracingindustries.com/yamaha-rd350-1974/

I'm trying to find information, but there doesn't seem to be much out there.

My son wants to shoot a deer. I'm from a hunting family, but not one myself, so I'm here for technical and moral support. Sure is pretty!(Eastern Washington, near Pullman and the Snake River)

I love these pictures! None of them are me/mine and you may recognize yourself or your bike:



https://i.postimg.cc/cCW0fbCF/image.jpg[/img]









I wish I knew how to resize this one

Now I will be boring

A friend sent this to me, and I think it's a great message. Applies to life, really, not just bikes.

https://m.youtube.com/watch?v=8JUg2LQTWNs&feature=youtu.be

Short story long: I want to put a fat bar on my RD like Ed has on his R5, but the GSX-R upper clamp is super thin where I'd need to drill holes for risers, so I'm looking at clip-ons like a dumb 20-something (apologies, dumb 20-somethings out there). Fast from the Past has these offset Tarozzis that I kinda like better than their "riser" options:



Do any of you fine folks have experience with such a thing, or have a better solution? I guess I should say that super low 'bars aren't as kind to me as they once were, hence the fat bar idea.

This almost belongs in the 4-stroke blasphemy section, but a friend needs to get his starter motor repaired or replaced:



Goki aftermarket starter on an ATC350X. Having owned and kick started an XR350R as a much younger man, I can appreciate what this little motor was up against! Does anyone know where I can send him for help with this conundrum?