A-VF, A-VG Motorcycle class

[Abeblinkin]

Hello, I'm new to the forum Ive been reading it awhile but just signed up. I have always been interested in building a bike so I figure I better start researching stuff if its ever going to happen one day.

My question is about the vintage class. I see the rule book states only pre 1956 engines will classify as vintage. Does this mean that the same engine produced after 1956 would qualify? Say a 1962 tiger cub engine, would that qualify as vintage. I became confused when I read some other posts and saw that a vintage record was held by a cub when I thought they were first produced in 1956? I'm sure this is a stupid question so you experts take it easy on me! Thanks

[Calkins]

Oh boy!  I did know a thing or two about the Cubs!  The 200cc Tiger Cub was first built in 1953.  That type of block, a single piece casting, was built until 1959 or so.  After that, the vlocks were split down the center to make a two piece crankcase.  The first series of engine would be legal.  The rulebook says something along the lines of 'like parts' that make the '56-'59ish parts legal since they are the same part with the same casting number.  I have alot of money into the books, parts list, manuals, etc that I have no need for if your interested.

[Abeblinkin]

The reason why I was asking is a guy near me has a 62 Cub for sale cheap and I thought it would be a good start. Then when I read through the book I saw that "like parts" thing in there too so it got me thinking. I guess there would be no reason to use the 62 if I couldn't run in the vintage class. Thanks for the offer on the books and manuals if I end up finding an earlier model I'll get back to you. Thanks for clarifying that for me.

[Abeblinkin]

If anyone has any suggestions on a 250cc, 175cc or 100cc engine that would run in the vintage class I would love to here them.Thanks

[willieworld]

harley 250 and 350 sprint motor   if they are old enough               willie buchta

[Nortonist 592]

Willie,  I think 250 and 350 sprint motors are a bit "young" for the vintage class.

[tomsmith]

How about a 1936 Harley 350cc speedway motor?  In 1952 I rode one a quarter lap on an eighth mile track.  The guy in front of me washed out my front wheel, thus ending my speedway career with a face plant in the berm dirt.  A week or two later I went to Bonneville and that was (almost) it.  I wonder what happened to the speedway bike - we had three motors but could only assemble the 350cc one and didn't have to buy any new parts.  The two 500cc motors were too far gone.  I heard that it once got a third place in the main with a fresh rider.

[slopoke]

.

[Abeblinkin]

So if I used the 63 tiger cub motor i could run in the A-PF or A-PG Class correct?

[Nortonist 592]

Correct Abe.  If the Cub enigne is in a Triumph frame you could run Modified.  Is that a 175cc engine?  If so it appears that A/PG and A/PF are open. 

[Abeblinkin]

Its a 199cc motor. So it would have to be in the 250cc class. I guess you could bore it out slightly larger maybe get 10-15 more cc out of it but I don't know too much about triumphs, (YET). The A-PF & A-PG records look at least achievable someday providing the guy setting the vintage records doesn't decide to run in the non vintage pushrod class right? I heard he is going to be much faster this year (above 100). Thoughts? I'm sure your getting sick of my questions but I feel like I should do some research before I dive in.

[Calkins]

I thought I saw Chuck Zeglin run around 98mph at ElMo.  He told me that he bored out his Cub to take a Triumph 500 or 650 twin piston.  He sent me a picture of a fairing that he's wanting to run this year.

[Nortonist 592]

Theres a company in West Yorkshire, England called Serco.  Don't have an e-mail address.  All I have is a name and a phone number.  Ian Roberts and their phone number is 01484-715288.  They do rod and crankshaft needle roller conversion (exchange) and cylinder kits that allow you to go to 230cc, 250cc, or 260cc.  Might be worth following up.

Chuck Zeglin's Cub is a beauty.  And fast.


By weslake, shot with Canon PowerShot A430 at 2009-05-28

[Calkins]

Great!  I'll have to check that out.  Thanks!