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[hogdownunder]

Hi Guys,

Can anybody tell me the size of the Intake and Exhaust valves on the Stock 110cc CVO Motor?

It appears that the 110 Head is a fairly efficient Head as stock when it comes to valve size!

If the 110 Heads were modified (say: T-MAN 110 Street Performer or Thumper Series) to suit a larger Cam of choice with increased compression as well, what are the benefits of installing bigger valves to this head?

Is the valve size a thing of choice to suit a particular build, or would it be an overkill for the 110 in general?

What are your thoughts?

[TorqueInc]

 2.08 intake  1.625 exhaust

  IMO the intake valve is too small for the seat throat diameter,I generally put a 2.10 intake 1.635 exhaust in for basic upgrade.

[hogdownunder]

Hi John,

Thanks for your reply.

If you were doing a high performance upgrade to the 110 head, what size valves would you recommend?

[prodrag1320]

we use the 2.100`s.just shipped a set of 110`s to a guy down in oz (340 @ 28") for a 2014 breakout

[TorqueInc]

Hi John,

Thanks for your reply.

If you were doing a high performance upgrade to the 110 head, what size valves would you recommend?

  2.125/1.645 but it depends on the rest of the package,compression,cam.....also take into account budget as there are options.

   I prefer to use beehive springs with my camshafts and I have been coating the exhaust ports with good results.

[HILLSIDECYCLE.COM]

Hi Guys,

Can anybody tell me the size of the Intake and Exhaust valves on the Stock 110cc CVO Motor?

It appears that the 110 Head is a fairly efficient Head as stock when it comes to valve size!

If the 110 Heads were modified (say: T-MAN 110 Street Performer or Thumper Series) to suit a larger Cam of choice with increased compression as well, what are the benefits of installing bigger valves to this head?

Is the valve size a thing of choice to suit a particular build, or would it be an overkill for the 110 in general?

What are your thoughts?

Valve size would not be detrimental larger, or smaller...all depends on the port configuration.

The 2.080" OEM valve is quite enough for most applications.
Scott

[HD Street Performance]

Is the valve size a thing of choice to suit a particular build, or would it be an overkill for the 110 in general?

It would entirely depend on your goals, how you ride and the typical payload / gearing.

[hogdownunder]

Hi Guys,

Thank you for your replies.

Best regards,

[TorqueInc]

Valve size would not be detrimental larger, or smaller...all depends on the port configuration.

The 2.080" OEM valve is quite enough for most applications.
Scott

  Depends also how well the original machine work and as cast port is aligned ......I just got a set in .....the effedupedness is making me want use them for target practice.....and they are black ....one of the exhaust guides is broken off too this wil be the third time I have seen that.

[FlaHeatWave]

  Depends also how well the original machine work and as cast port is aligned ......I just got a set in .....the effedupedness is making me want use them for target practice.....and they are black ....one of the exhaust guides is broken off too this wil be the third time I have seen that.

Is effedupedness a technical term

[Yellow09SERG]

Must be extremely technical

[TorqueInc]

Must be extremely technical

   Sorry far from technical just disturbing that some of the heads have terrible core shift amongst other problems....and how horrable the state of tune is from the factory

[FlaHeatWave]

   Sorry far from technical just disturbing that some of the heads have terrible core shift amongst other problems....and how horrable the state of tune is from the factory

TR mentioned something about that, the other day...

[GMR-PERFORMANCE]

If the heads are being done  new guides that is part of the deal at that point a valve job is needed why not bump to the 2.120 valve right then. There is NO downside to it at all. Stock or other wise. we bump to the 2.120 on most sets if other work is being done.  Correcting issues with the stock heads is a win win.. increased reliability and increased performance.

[TorqueInc]

cannot think of a reason not to go to a larger valve...2.12 or larger

  Can you get good numbers with a stock valve ?   Yes you can but airflow isn't everything

   Last set I did using a new set of replacement ferreas went 308 front and 311 rear @.600 lift

  Had it been my heads the $60 upcharge to install a little larger set of valve would have been an easy sell.