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Stubby cans query

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killa
Won't Shut Up



Joined: 18 Oct 2004
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PostPosted: 08:36 - 01 Jun 2017    Post subject: Stubby cans query Reply with quote
The bike I am potentially looking at buying is a V twin but the guy says it’s not running 100% as it has a set of stubby cans on. He said if I get the thing dyno jetted to those cans it should be fine.

The guys at my local bike shop told me the cans are just always shi* and should be replaced with full length cans. This I suppose is due to the power/pulses from the engine but I wondered if someone could enlighten me further so I am armed with some more info when I go to see the bike.
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 10:09 - 01 Jun 2017    Post subject: Reply with quote
What bike and year?
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killa
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Joined: 18 Oct 2004
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PostPosted: 14:22 - 01 Jun 2017    Post subject: Reply with quote
Paddy. wrote:
What bike and year?


Yamaha TRX 850
1997
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V2
Nearly there...



Joined: 06 Feb 2006
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PostPosted: 15:46 - 01 Jun 2017    Post subject: Reply with quote
My VTR runs with straight through remus full length cans, I don't think it has been dynojetted or anything like that but I cant imagine the length of the can to be all that critical if it has no baffles (apart from noise levels)

Anyway if you're buying from a shop it should be running well or very very cheap on the basis that if they cant get it to run well and are just selling it on then there must be something badly up with it! I mean if a bike shop could just get their mechanic to fit a dynojet kit then profit I'm sure they would!
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sickpup
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Joined: 21 Apr 2004
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PostPosted: 15:47 - 01 Jun 2017    Post subject: Reply with quote
killa wrote:
The bike I am potentially looking at buying is a V twin


killa wrote:
Yamaha TRX 850
1997


Pretty sure thats not a V-twin.

But yes, stubby cans can cause carburation problems.
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killa
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Joined: 18 Oct 2004
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PostPosted: 07:27 - 02 Jun 2017    Post subject: Reply with quote
sickpup wrote:
killa wrote:
The bike I am potentially looking at buying is a V twin


killa wrote:
Yamaha TRX 850
1997


Pretty sure thats not a V-twin.

But yes, stubby cans can cause carburation problems.


Ok, parallel twin with the firing changed to make it sound like a V twin?

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RhynoCZ
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Joined: 09 Mar 2012
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PostPosted: 08:06 - 02 Jun 2017    Post subject: Reply with quote
sickpup wrote:
killa wrote:
Yamaha TRX 850
1997
Pretty sure thats not a V-twin.


To be fair though, they did use the ''270° crankshaft'' to mimic a V-twin engine characteristics. Razz
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sickpup
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Joined: 21 Apr 2004
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PostPosted: 08:26 - 02 Jun 2017    Post subject: Reply with quote
RhynoCZ wrote:
To be fair though, they did use the ''270° crankshaft'' to mimic a V-twin engine characteristics. Razz


To be fair it didn't give it the perfect primary balance of a 90 degree v-twin just made an engine that vibrated a lot and needed massive crank webs to stop it exploding under the vibration.
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RhynoCZ
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Joined: 09 Mar 2012
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PostPosted: 08:36 - 02 Jun 2017    Post subject: Reply with quote
sickpup wrote:
RhynoCZ wrote:
To be fair though, they did use the ''270° crankshaft'' to mimic a V-twin engine characteristics. Razz


To be fair it didn't give it the perfect primary balance of a 90 degree v-twin just made an engine that vibrated a lot and needed massive crank webs to stop it exploding under the vibration.


Also true. Thinking
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Rogerborg
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Joined: 26 Oct 2010
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PostPosted: 08:45 - 02 Jun 2017    Post subject: Re: Stubby cans query Reply with quote
This 'un? I guess not, that comes with the standard cans as well.

"appreciating classic" Rolling Eyes

killa wrote:
He said if I get the thing dyno jetted to those cans it should be fine.

"Just needs... I'd do it myself but..."

I bet it'll sail through its next MOT, right?

He might be right, but it's a 20 year old bike that you shouldn't throw money at. Do you really want to take it on as a project?
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killa
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Joined: 18 Oct 2004
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PostPosted: 09:13 - 02 Jun 2017    Post subject: Re: Stubby cans query Reply with quote
Rogerborg wrote:
This 'un? I guess not, that comes with the standard cans as well.

"appreciating classic" Rolling Eyes

killa wrote:
He said if I get the thing dyno jetted to those cans it should be fine.

"Just needs... I'd do it myself but..."

I bet it'll sail through its next MOT, right?

He might be right, but it's a 20 year old bike that you shouldn't throw money at. Do you really want to take it on as a project?


It’s no longer on eBay, he didn’t sell it…short by £50 on the reserve.
I believe it to be a good bike but I don’t know why he got rid of the original cans and kept these stubbys on if it runs sh*t.
It’s all good to go with an MOT and up to date servicing. He doesn’t use it a lot hence why he didn’t bother getting it setup right.
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........
Borekit Bruiser



Joined: 01 May 2017
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PostPosted: 09:27 - 02 Jun 2017    Post subject: Re: Stubby cans query Reply with quote
killa wrote:
Rogerborg wrote:
This 'un? I guess not, that comes with the standard cans as well.

"appreciating classic" Rolling Eyes

killa wrote:
He said if I get the thing dyno jetted to those cans it should be fine.

"Just needs... I'd do it myself but..."

I bet it'll sail through its next MOT, right?

He might be right, but it's a 20 year old bike that you shouldn't throw money at. Do you really want to take it on as a project?


It’s no longer on eBay, he didn’t sell it…short by £50 on the reserve.
I believe it to be a good bike but I don’t know why he got rid of the original cans and kept these stubbys on if it runs sh*t.
It’s all good to go with an MOT and up to date servicing. He doesn’t use it a lot hence why he didn’t bother getting it setup right.


He didn't get rid of the original cans. They're in his loft and he hasn't refitted them as it would disprove his excuse. He'll sell them on ebay later.

He doesn't use it a lot because it runs sh*t.
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Rogerborg
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Joined: 26 Oct 2010
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PostPosted: 09:37 - 02 Jun 2017    Post subject: Reply with quote
I'd ride it and then decide.
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killa
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Joined: 18 Oct 2004
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PostPosted: 09:48 - 02 Jun 2017    Post subject: Reply with quote
Yep, going to see the bike before talking money.
He'll be able to hear me breaking the speed limit in his neighbourhood. Laughing
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The last post was made 8 years, 257 days ago. Instead of replying here, would creating a new thread be more useful?
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