Talk:Yamaha YZ450F

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"In 1996, the AMA changed racing rules to allow 450cc four strokes to compete in the same racing class as 250cc two strokes" wrong? someone correct me otherwise, but yamaha developed a 400cc bike, not 450, and later in the article about the 450 there is a mention of new rules.... also, reference is to the 2006 rulebook, not the '96 one. note the ten year difference. Motorbyclist 03:48, 20 May 2007 (UTC)

I don't know the full ins and outs of the history but IIRC the FIM (and presumably the AMA) at some point around the YZ400F created the 4504T is euqal to a 2502T rule for MX (ie you could run them in the same class, previsouly it was 250cc 2t ***AND*** 4t). the YZ fourstroke went through development, wiht the YZ426F coming out the next year, followed ever since by the YZ450F and other manufactres 450cc's. One presumes the reference to the rule book is the standard table that shows what cc's are for which class (eg in the states the "motocross" class is probably 275cc 4T up to 450cc 4T and 175cc 2T up to 250cc 2T). Pickle 09:53, 20 May 2007 (UTC) (a Brit, who only knows the UK/FIM end of things really)

Yeah, that was a mistake on my part. Yamaha did develop the YZ400F first, not the 450. The rule was actually instated with a 520cc limit on four-strokes, but for 2002, the displacement limit was lowerd to 450cc's. I know this for a fact, but it's difficult to find a reputable online source for this. Any suggestions as to how to incorporate this into the article? Barang 19:29, 20 May 2007 (UTC)

[edit] Article name

If the YZ400F, YZ426F and YZ450F are all pointing to this page, should it not be renamed to something more apppropriate such as "Yamaha's big cc fourstroke motorbike" or something ??? Pickle 00:55, 23 May 2007 (UTC)

[edit] phoot ID

Attention yamaha MX experts, owners, etc - Is this a YZ450F or YZ250F ??? - thanks in advance Pickle 11:42, 23 September 2007 (UTC)

If it helps I uploaded another shot of the same (pretty sure) bike and rider taken without motion blur --Fir0002 00:03, 24 September 2007 (UTC)

Cheers Fir0002, all i can read is "GYTR" which on googling with yamaha dosne't bring up much (some sort of factory extra). I'm hoping a yamaha and/or MX expert will be able to fill us in ;) Pickle 20:53, 25 September 2007 (UTC)