GT250 Cafe - Build Experiment

Tom Garcia · Post by **Tom Garcia** » Tue Aug 04, 2009 12:17 pm

Brett Kerby wrote:Dying for an update Tom. Hows it going?

Heck...Me Too!!!!

Work has finally slowed...a little but just got a house here in Ohio and the movers are supposed to show at the GA house on the 10th... I hope to be settled in by the end of the month and hope I can start it moving again...

Tom

Tom Garcia · Post by **Tom Garcia** » Tue Aug 04, 2009 2:11 pm

OK... Here's another picture...

IT'S ALL IN BLENDING THE REED BOX TO THE ITTY BITTY PORT....

BTW - They aren't centered correctly on the cylinders in the above pic... No vacuum leak jokes...

Suzukidave · Post by **Suzukidave** » Tue Aug 04, 2009 4:17 pm

Wow !!! very nice Tom , and the reeded engine your putting into it is going to run sooo sweet . I can see that little boy being a Gap monster

Tom Garcia · Post by **Tom Garcia** » Tue Aug 04, 2009 4:35 pm

It seems like it should be pretty "flickable".... Maybe a "flickable grenade"... Time will tell....

tz375 · Post by **tz375** » Tue Aug 04, 2009 5:42 pm

That's a lot of reed area for such tiny ports. By the time you add boost ports and maybe Boysen ports it might look more balanced.

Does look sexy though.

Suzukidave · Post by **Suzukidave** » Tue Aug 04, 2009 5:54 pm

Something like this

Tom Garcia · Post by **Tom Garcia** » Tue Aug 04, 2009 6:08 pm

You mind reader you!!!! But you forgot the port in the floor....

Brett Kerby · Post by **Brett Kerby** » Tue Aug 04, 2009 7:43 pm

Awww got my fix....That is going to be one sweet ride...........BK

tz375 · Post by **tz375** » Tue Aug 04, 2009 10:59 pm

Tom,

Is there enough space between the studs to do that? On our 750's it's a real pain to get the extra port area that they need and almost all the studs are in the wrong places.

Remember the RG250 Gamma? They had crankcase reeds and piston ported cylinders and worked rather well as I recall. Not as good as teh later RGV but my son's bike was faster than my RD400 and a heck of a lot easier to ride fast. Of ocurse that one had a cute aluminum frame, but that's another story.

Tom Garcia · Post by **Tom Garcia** » Wed Aug 05, 2009 7:01 am

tz375 wrote:Tom,

Is there enough space between the studs to do that? On our 750's it's a real pain to get the extra port area that they need and almost all the studs are in the wrong places.

When centered, the studs are about 5mm inside the box on each side so I have to blend around them. Once the boxes are mounted I will probably rough in the port with a mill then blend by hand... (Translation - there are way too many chances to screw this up considering my track record)

There's always JB WELD!!!!

Suzukidave · Post by **Suzukidave** » Wed Aug 05, 2009 7:14 am

Tom , when i did mine i did most of the hard grinding to the cylinder before i mounted up the boxes , it sure made it easier to get into the port with the grinder and files

Tom Garcia · Post by **Tom Garcia** » Wed Aug 05, 2009 7:19 am

I plan to make the boxes bolt-on which should eliminate the access issues with welded-on boxes...

Suzukidave · Post by **Suzukidave** » Wed Aug 05, 2009 10:35 am

Tom Garcia wrote:I plan to make the boxes bolt-on which should eliminate the access issues with welded-on boxes...

Cool

tz375 · Post by **tz375** » Wed Aug 05, 2009 8:36 pm

Bolt on boxes would make our 750 conversions a whole lot simpler Dave.

I'll have to look at mine and see if it's feasible at this late stage. I may have to weld on a "flange to drill through, but that would probably be easier than welding the boxes straight onto the rear face of the block.

Suzukidave · Post by **Suzukidave** » Wed Aug 05, 2009 8:38 pm

Richard , the way the intake side of the block is designed i dont think they could be bolted on without doing some sort of welding .