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Honda CB750/900/1100F SuperSport Website: SuperSport Forums


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AGDT
Twinstar
Twinstar



Joined: Sep 25, 2013
Posts: 47
Location: Barossa Valley. Sth Oz

PostPosted: Thu Jul 18, 2019 10:41 am Reply with quote Back to top

Has any of the Australian members here put a 1100 into a 750 and been through the process of changing the engine numbers on their Rego papers.

I plan on moving from South Oz to Tasmania so the bike has go through a roadworthy inspection. AFAIK i only have to upgrade the brakes to twin piston calipers.

Has anyone been through this?

Cheers Tony
 
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norm
Silver CB900F
Silver CB900F



Joined: Jan 13, 2010
Posts: 1399
Location: Melbourne Aus

PostPosted: Fri Jul 19, 2019 12:24 am Reply with quote Back to top

HI Tony,
I guess you could email them and see what they want, always hard dealing with government departments because most of them don't understand the basics but this is where I would start. Good riding roads in Tas but it does get a bit cold down there at this time of the year
Vehicle Registration - Transport Tasmania
https://www.transport.tas.gov.au/online/vehicles
 
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AGDT
Twinstar
Twinstar



Joined: Sep 25, 2013
Posts: 47
Location: Barossa Valley. Sth Oz

PostPosted: Fri Jul 19, 2019 10:36 am Reply with quote Back to top

Thanks for the reply Norm, i think ill try and change the engine numbers over here in South Oz first, if that isnt successful without too much drama ill have to get the the 750 cases that came out of it and get them machined to take the 1100 barrels.

Cheers and Thanks

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1980 CB750FZ with 1100 engine, A chain oiler mod , Captains shift star, Stage 1 Dynojet kit 
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DonR
CB1100F
CB1100F



Joined: Feb 17, 2009
Posts: 2050
Location: Oz

PostPosted: Sat Jul 20, 2019 3:59 am Reply with quote Back to top

Not sure about the other states but in NSW if you use install an engine 20% bigger than the original it will need an engineering certificate.
 
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thx113
Friend of the Board
Friend of the Board



Joined: Apr 23, 2005
Posts: 3493
Location: Western Australia

PostPosted: Sat Jul 20, 2019 4:37 am Reply with quote Back to top

Good question. WA can change engine numbers with a form but not sure how a change in capacity would be viewed.
I went the other way when I put my 750 into a 900 frame to get the better front end. Still had to go over the pits.

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Running 0.06mm to 0.09mm valve clearances since 1983 and proud of it.
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norm
Silver CB900F
Silver CB900F



Joined: Jan 13, 2010
Posts: 1399
Location: Melbourne Aus

PostPosted: Sat Jul 20, 2019 4:56 am Reply with quote Back to top

I think SA is probably the best way to go, they seem pretty relaxed over there, I don't think you even have to get a RWC to see a vehicle there so I would probably try that path.Other alternative is to see what you can do there on a Club reg permit, they are more relaxed with those and Tassie has a number of vintage bike clubs there. Unless you are commuting on your bike club reg is the way to go. $77 a year compared to over $700 pa in Vic
 
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AGDT
Twinstar
Twinstar



Joined: Sep 25, 2013
Posts: 47
Location: Barossa Valley. Sth Oz

PostPosted: Sat Jul 20, 2019 11:36 am Reply with quote Back to top

Thanks for your thoughts

_________________
1980 CB750FZ with 1100 engine, A chain oiler mod , Captains shift star, Stage 1 Dynojet kit 
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AGDT
Twinstar
Twinstar



Joined: Sep 25, 2013
Posts: 47
Location: Barossa Valley. Sth Oz

PostPosted: Sat Jul 20, 2019 11:48 am Reply with quote Back to top

This may be interesting but ill give it a try.

https://www.sa.gov.au/__data/assets/pdf_file/0006/16395/MR620-APPLICATION-TO-MODIFY-Motor-Vehicle-2013.pdf

See what they say

Dont like my chances there is a 43% increase in power

_________________
1980 CB750FZ with 1100 engine, A chain oiler mod , Captains shift star, Stage 1 Dynojet kit 
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norm
Silver CB900F
Silver CB900F



Joined: Jan 13, 2010
Posts: 1399
Location: Melbourne Aus

PostPosted: Sun Jul 21, 2019 2:25 am Reply with quote Back to top

Tony,
try hunting down an auto engineer who also does motorbikes and see what they say. As it is a bolt in conversion I don't think there is a big issue as there are no frame modifications, no difference than bolting a V8 into a 4 cylinder Torana, as long as nothing is cut/altered there should be no issues.
 
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AGDT
Twinstar
Twinstar



Joined: Sep 25, 2013
Posts: 47
Location: Barossa Valley. Sth Oz

PostPosted: Wed Aug 07, 2019 7:47 am Reply with quote Back to top

Well i have some good news , the South Australian Dept of Motor Transport accepted the engine number change and engine capacity and amended my rego papers to match.

Didnt cost me a cent and the old girl is 100% legal.

Awesome.

Cheers Tony
 
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norm
Silver CB900F
Silver CB900F



Joined: Jan 13, 2010
Posts: 1399
Location: Melbourne Aus

PostPosted: Wed Aug 07, 2019 8:32 am Reply with quote Back to top

Hi Tony,
excellent news now just remember that the roads in Tassie are great but it does snow down there a bit during winter
 
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AGDT
Twinstar
Twinstar



Joined: Sep 25, 2013
Posts: 47
Location: Barossa Valley. Sth Oz

PostPosted: Wed Aug 07, 2019 9:04 am Reply with quote Back to top

Yeah I know I lived down there for 13yrs in the Huon Valley

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