Awesome home porting

[yamanube]

Some nice work there...

http://www.ebay.com/itm/Yamaha-61x-...ash=item1a0aafed94:g:xZUAAOSwbdpWbHd0&vxp=mtr


Used 61x 701 ported cylinder. Needs bore. One sleeve has some weird chunks out of it. (See pics) was removed from running motor. Current bore 81.5mm. Cylinder is ported. Transfers just matched up with sleeves. Exhaust raise slightly. Measures 37mm to top. Had been running wiseco pistons. Clearance was ok, just had some moisture in motor and cylinder walls have some rust. Would recommend boring to 83mm? To try and clean up sleeve on that sleeve. All threads ok. Feel free to ask questions! Paypal only! Shipping for 48 states only! All other ask for quote.

 

[Quinc]

Should have used a Yamanube template!

 

[yamanube]

Should have used a Yamanube template!

LOL, I was thinking I could have save a decent amount of time drawing up my templates.

 

[JetManiac]

I saw that too and forgot to post it...lol. Sweet work.

 

[yamanube]

NEW!! Budget porting templates..$5

 

[bored&stroked]

Its like someone who knows big block chevy v8's well and thought "well the oval port heads were mild applicatons, all the high performance were square port heads, that must be the hot ticket!" and went to town.

 

[Lumpy]

Wonder how many rings were caught with that.

 

[McDog]

Cutting wheel on a dremel must have been their only tool.

 

[Blue]

Nice boat anchor. Might as well cut the pesky piece of steel out between the transfer ports while ur at it. It probably restricts flow too. Lol

Sent from my SAMSUNG-SM-N920A using Tapatalk

 

[yamanube]

Cutting wheel on a dremel must have been their only tool.

I thought this too but how they made the vertical cuts had me scratching my head...almost seems like they did it with the sleeves out. There was a decent amount of time spent on the transfers, and removing the sleeve for that matter, why chop the exhaust port like that?

 

[Yami-Rider]

removing the sleeve, i think would be the only way they could have done that. Odd indeed.

 

[Dartman]

nobody saw this coming
it was run with the piston in backwords
you can see the sharp edges the ring end cut
port is aggressive but not the only reason

 

[restosud]

could be done with a 90deg attachment and cut off wheel but man!
we all know a nice square ex port makes for a nice sharp exhaust pulse.who needs these pesky tuned chambers!

 

[Neno]

Ruined cylinder. Never raise ports