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Author Topic: rotax 500 vs yamaha tt500 engines  (Read 7577 times)

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Offline jimg1au

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rotax 500 vs yamaha tt500 engines
« on: June 30, 2012, 07:28:49 am »
hi
i have been offered a rotax 500cc 4 stroke motor it has been rebuilt but dont know if for racing or the std trail bike motor.
i have heard that they can go well but are fragile and expencive to fix
would i be better off with my 500cc yamaha motor that has way more power than i can use
it will be used for dirt track only
jim
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Offline holeshot buddy

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Re: rotax 500 vs yamaha tt500 engines
« Reply #1 on: June 30, 2012, 11:53:37 am »
rotax eng lighter chrome bore roller cam
they get 80hp out of them in US for flatrack
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Offline shortshifter

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Re: rotax 500 vs yamaha tt500 engines
« Reply #2 on: June 30, 2012, 01:28:18 pm »
HB are they the engines they use in the ATKs as well?There is one for sale at a pawn shop in Nambour at the moment.
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Offline Lozza

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Re: rotax 500 vs yamaha tt500 engines
« Reply #3 on: June 30, 2012, 02:58:26 pm »
Quote from: jimg1au on June 30, 2012, 07:28:49 am
hi
i have been offered a rotax 500cc 4 stroke motor it has been rebuilt but dont know if for racing or the std trail bike motor.
i have heard that they can go well but are fragile and expencive to fix
would i be better off with my 500cc yamaha motor that has way more power than i can use
it will be used for dirt track only
jim
Having  spent many hours playing with Rotax engines safe to say the Yamaha is trail bike engine and the Rotax a competition engine. I could probably get you the bits and pieces Jim they are well priced wen you don't go through 'middle men'  ;)
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Jesus only loves two strokes

Offline holeshot buddy

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Re: rotax 500 vs yamaha tt500 engines
« Reply #4 on: June 30, 2012, 05:51:28 pm »
yeah the atk ran a rotax 605 eng
cam belt drive all the good stuff
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Offline pancho

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Re: rotax 500 vs yamaha tt500 engines
« Reply #5 on: June 30, 2012, 06:05:45 pm »
 I recon stick to the XT Jim, cash the Rotax
 and keep the change!
pancho
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mainline

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Re: rotax 500 vs yamaha tt500 engines
« Reply #6 on: June 30, 2012, 06:48:40 pm »
Quote from: shortshifter on June 30, 2012, 01:28:18 pm
HB are they the engines they use in the ATKs as well?There is one for sale at a pawn shop in Nambour at the moment.

Have to start hanging around the Nambour pawnshop. The local ones just have guitars with bent necks, stolen power tools, and roller skates with a wheel missing
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Offline oz555ktm

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Re: rotax 500 vs yamaha tt500 engines
« Reply #7 on: June 30, 2012, 11:29:07 pm »
 If any one out ther  that has parts or Motor for a KTM/rotax thay dont want or are Not going to use

 Please  can you send them my way ... as I am in need of parts  for my  ktm 504

 
« Last Edit: July 01, 2012, 12:15:28 am by oz555ktm »
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Offline jimg1au

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Re: rotax 500 vs yamaha tt500 engines
« Reply #8 on: July 01, 2012, 06:57:17 am »
Rotax Engines
 







Rotax 605 (604ES) electric start engine for sale, good used condition. Southern California. Pick up or ship UPS.





this is in ca cheap shipping to sydney once in long beach




Rotax 504/604 good used bottom end for sale, 79.4 or 81mm stroke available. Includes cases, bearings, 5-speed transmission, oil pump and new seals. . Southern California. Pick up or ship UPS.

Call for more information. Ron Wood 949-645-0393

June 30
 
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Offline EML

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Re: rotax 500 vs yamaha tt500 engines
« Reply #9 on: July 01, 2012, 10:39:25 am »
Big arguments in UK sidecarcross at the moment is whether the Rotax is eligible for pre'85 as they clean up-much lighter than XS motors and same or better power-they wont let them use elec start model.
So if it's not reqd-send it to me. I'll even pay the freight!
 
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Offline 270YAM

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Re: rotax 500 vs yamaha tt500 engines
« Reply #10 on: July 01, 2012, 11:47:26 am »
Vaughn, were they popular back in the day? (in sidecarcross) Or did the 2T mopeds take over?
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TM BILL

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Re: rotax 500 vs yamaha tt500 engines
« Reply #11 on: July 01, 2012, 12:53:05 pm »
Quote from: mainline on June 30, 2012, 06:48:40 pm
Quote from: shortshifter on June 30, 2012, 01:28:18 pm
HB are they the engines they use in the ATKs as well?There is one for sale at a pawn shop in Nambour at the moment.

Have to start hanging around the Nambour pawnshop. The local ones just have guitars with bent necks, stolen power tools, and roller skates with a wheel missing

 ;D ;D ;D ;D ;D ;D
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Offline EML

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Re: rotax 500 vs yamaha tt500 engines
« Reply #12 on: July 01, 2012, 01:04:30 pm »
270, They were just getting headway when the twosmokers came in and took over. On the twinshock chair site they are debating them almost daily-whether they can or can't score points at this or that meeting etc...
The counter argument is for or against later model brakes or copy frames being allowed etc.... but for me here, where we had 500 single four strokes as a class before the onset of 2stroke moderns, they are/would be a great motor.
To me, these blokes over there that try to make their old twinny outfit try to look like a modern is just shit-there is a beautifully refurbed Norton EML that has a modern front plate and sidecar facia and that looks crap.
Back to the Rotax-they are the goods for racing and the old Yams are for trailbiking. Another goody is the Husky fourstroke with the twostroke bottom-end, very nice! 
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Offline Mick D

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Rotax HL ?
« Reply #13 on: July 01, 2012, 01:27:58 pm »
Quote from: shortshifter on June 30, 2012, 01:28:18 pm
HB are they the engines they use in the ATKs as well?There is one for sale at a pawn shop in Nambour at the moment.

Geez, if I lived in south east Qld? I would be grabbing this 79 frame(pic is link).


Then I would be camped out side the pawn brokers door in Nambour Tonight.
« Last Edit: July 01, 2012, 02:55:47 pm by MICK-DE »
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Offline gra1961

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Re: rotax 500 vs yamaha tt500 engines
« Reply #14 on: July 02, 2012, 07:10:20 pm »
its a complete atk at the hock shop in nambour but its not for sale .i think the owner of the bike was just getting a loan
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