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Old 02-24-2009, 11:45 PM   #1
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Smile godzukihop: your hyper 12 is ready

Bro., your engine is ready for racing now......















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Old 02-25-2009, 04:34 AM   #2
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hey blee, how much does it cost for you to modify one of these, i got a mate who might be interested.

mitchell
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Old 02-25-2009, 06:57 AM   #3
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Hi Benny,
could you mod a picco evo2 .21? are you in HK or usa?
thanks
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Old 02-25-2009, 10:40 AM   #4
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Quote:
Originally Posted by NiTrO BoOsTeR View Post
hey blee, how much does it cost for you to modify one of these, i got a mate who might be interested.

mitchell

See PM.
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Old 02-25-2009, 10:41 AM   #5
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Quote:
Originally Posted by aussies1129 View Post
Hi Benny,
could you mod a picco evo2 .21? are you in HK or usa?
thanks

I am in USA........ my brother's shop is in HK.

See PM.
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Old 02-25-2009, 02:45 PM   #6
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Quote:
Originally Posted by blee View Post
I am in USA........ my brother's shop is in HK.

See PM.
Hey Benny got your PM thankyou for that!
cheers
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Old 02-25-2009, 11:51 PM   #7
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Hey Benny got your PM thankyou for that!
cheers
Replied.
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Old 02-26-2009, 12:38 AM   #8
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Any timings canged ?

Looking at the crankshaft I think not. If so then it is a nice job but forgot to sharpen the closing end.
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Old 02-26-2009, 04:21 AM   #9
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A well known engine manufacturer has this remark in there product information: (source: novarossi.com)

Quote:
The crankshaft is grinded to increase the mixture flow
Yet engine tuners do the exact opposite...
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Old 02-26-2009, 11:48 AM   #10
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Ok, this is probably getting me flamed again, but I do NOT see ANY modifications to that engine, other than a nice polishing job, which will do almost nothing for the engines performance, in some areas it will even hurt performance.

No timing change on the crank and none on the sleeve.

The teardrops won't improve the performance in a noticeable way.

We had a guy at our track who modified his engine after pictures he found on the web. Looked about the same but wasn't the least bit faster.....
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Old 02-26-2009, 03:12 PM   #11
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Quote:
Originally Posted by stefan View Post
Ok, this is probably getting me flamed again, but I do NOT see ANY modifications to that engine, other than a nice polishing job, which will do almost nothing for the engines performance, in some areas it will even hurt performance.

No timing change on the crank and none on the sleeve.

The teardrops won't improve the performance in a noticeable way.

We had a guy at our track who modified his engine after pictures he found on the web. Looked about the same but wasn't the least bit faster.....
Are you serious?
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Old 02-26-2009, 03:59 PM   #12
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Quote:
Originally Posted by kewdawg View Post
Are you serious?
100%.

If you have a different opinion, please tell me what you think, the modifications to this engine are.
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Old 02-26-2009, 04:07 PM   #13
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well an easy one is the crank....look at the end that the piston attaches to in the first picture and then in the second....you will see that there is a notch in it. Also look at the ports in the sleeve in the first picture then in the rest. U will notice that there have been notches put in the corner....what this does i couldnt tell you but there is a very distinct difference in the original and the modified
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Old 02-26-2009, 04:47 PM   #14
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Quote:
Originally Posted by stefan View Post
100%.

If you have a different opinion, please tell me what you think, the modifications to this engine are.
No two modifications are the same as are the modifiers. Let the end user be the judge. I don't see where your crditical assumption was necessary or needed. You could've simply said; "let us know how it turns out". Why rain on someone's parade?
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Old 02-26-2009, 04:56 PM   #15
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The main performance of 2-stroke engines comes from the timings in combination with the exhaust. Flowing does help a tiny bit for an easy running engine but it does not boost any performance, even the silicone insert is a meaningless hype.
A nice book you can search to with google to download is is the "Jennings 2 stroke tuning guide"

But hey, if you want to pay for such work I will not stop you but I like to say that a very tiny change to the cranktiming which anyone can do by himself will do more to the performance than this (I must say) nice piece of work.
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