How to confirm a bike age / engine size?

Hello all, I suspect this might be the first of many questions, so thanks in advance!

I'm trying to confirm my bikes age and engine size, I have both the frame and engine number but have not yet been able to confirm 100%.

I think its a 460CR from around 1974/5 but would really like to confirm just in case I might pop a day time MOT on it.

Can anyone help, is there somewhere I can write to or phone to confirm?

I've also uploads a quick picture of the piston, which I measured at 83mm :-)

Thanks all.

not sure they made a 460 dirt bike , chainsaw yes. maybe a 450 or 400 . take more pics of the bike and post them and I am sure we can figure it out.

83mm =390 CR/ML if it is on standard bore

Hi John - I've popped up a couple of images, when I took it apart there was nothing there ( what I would call reed ports ?) it was open just a dirty version of the third picture.

The engine number starts 204600** which might match the 460?

I like the idea of this bike being one of the last made up odd bits and bobs, I've even found a sales flyer for the 460 which had '460' hand written over the top of an original model!

thanks

The 450 of 1974 had the same displacement as the 460 of 1975. There were really no changes other than the displacement decal

Can't seem to find many pictures of 460s but this is what I have found so far its its of interest / use but found a couple of the original 460 flyers and marketing material. Looks the same as mine although the air filter cover is different in a couple of the pictures.

The big bores all pretty much looked the same but I think the 450/460 had somewhat larger fin area over the 400. The piston size seems to be right for the 460 because where you measured the bore size was likely reduced with carbon at the top of the bore

Thanks for that, I'm guessing it safe then to refer to it as a 460 when I fill out the paper work. Now that's sorted time hunt down the correct decals. :-)

YEs you are correct about your bike. THey made 450's previous years and in 1975 they used up the spare parts they had and made the 460 which was bored slightly different 84 vs 81.5. I have the exact same bike. Belonged to my father. Has sat in the garage for 30 years. I cleaned it up a bit and it started right up. I'm looking to restore it or just sell it to someone who wants a Husky 460S. All original parts. Be glad to talk to anyone interested.

I'd be interested in that 460 Almy, where are you located?

Im in Utah

Let me know if you would like detailed pictures of it. I am interested in selling it cause I just can't find time to work on it myself. As I said, it is a 1975 460S #MK06958. It is in good condition as it has sat covered in a shed for the last 30 years (one of those kind of stories ). My mother was cleaning out the shed and gave me the bike last year, I cleaned a mouse nest out of the it and got it started up just like 30 years ago. All original parts. My father rode it in a few cross country races and at widowmaker one year. He then just rode recreationally with us boys for a few years before it sat.

I'd be very interested in pics. of the old Husky.

I'm traveling this week but I will try to get some pictures this weekend

Here are some pictures I took this weekend.

let me try again and see if I can do just one of each picture! LOL Note all original parts. Also will include some of the numbering found on the frame/motor.

some more....

last one...I also have the front racing plate and original documentation.