I bought a big bore I dont get it

[demidestructo]

Hi I bought a big bore that has 223 on the side but has a 65.5mm piston ,which I thought was what size the 200ccs have? whats the deal? I tried it it fits on xr200 and looks the same as stock jug.



Also does anyone know if i can use a cb barrel /jug on my cg? I want to use piston from big bore (65.5) and port match and polish the head and see how well I can make the 150cc run!

[bogieboy]

most of the 200cc engines are a 63 mm bore...

[humanbeing]

Originally Posted by bogieboy

most of the 200cc engines are a 63 mm bore...

It's 63.5. Some are 63 (Loncin)
Piston ring maker http://www.dongya.cn/prodlist.asp?page=7&tp=4&keywords= & parts wholesaler made it more clearly https://shop106450385.taobao.com

[demidestructo]

no guys 65.5 mm no typo 65.5mm the big bore is still on there i wish i could show you so you believe me! its
Mouse over image to zoom
Cylinder-Kit-223CM3-for-Honda-XR200-ATC200-XL200-w-Piston-65-5mm-Bore-Rings-Pin
http://www.ebay.com/itm/191596279700...%3AMEBIDX%3AIT

hope that works if not go to ebay and the cylinder kit 223cm3 is the ad

[humanbeing]

Why it's marked as 223 cuz it's for MD33 (65.5*62.2 | CRF230F is quite similar) clone https://item.taobao.com/item.htm?id=35517374143 | If jammed that in stock XR200 (65.5*57.8) , the compression ratio DROPS

[demidestructo]

If I get a wiesco high compression piston like 12 to 1 would it come back up or what would it be? Whats the formula so I can fiddle around with this with out asking a million combos?

[demidestructo]

also do carbs with acceleration pumps do anything more than regular keihin style carbs? I bought a cheap one to get it running and now i think I screwed up .I will buy another carb for the I have been interested in the vm mikuni series with accelerator pump series 22 26mm carb .any suggestions on good carbs ,I know just about any will work ,but I'm looking for 1/ 4 and 3/4 throttle performance as well. I'm still waiting for tires to be put on or i would been working myself.

[demidestructo]

no need on the carb question I went through and found my answer.I settled on a 27mm keihin with acceration pump. I know everyone says a 30mm and If I think there more to give than jets can solve I will step up t the bigger carb.The reason is this you can only get as much air in as out with a motor with a cam that has same lift on intake as exhuast.You can blow more air through a smaller straw than a bigger one but really how much bigger is it really? 3mm not much so .I want fuel injection so maybe thats next .I want to convert my xr200 to e start i een a xr400r with one and I wonder if i can stick one of those in my lifan.

[Weldangrind]

I've never seen an XR400R with electric start. That would be awesome.

You might be able to fit the starter from an early '80's Honda 200E ATC trike; they had electric start and a pull start, but you might just be able to harvest the electric start.

That said, it's all extra weight, which is a horsepower loss.

[demidestructo]

I am going to pull it apart when it comes home ,I might buy this suzuki bandit front end it only has 1k . I was going to take front forks wheels with brake disc and caliper, it has 17 inch aluminium wheels with brand new tires for 100. What do you thiink I dont know hhow to find out if they will fit or not.

I have a pic with the electric start on xr400r that bike is awesome I want it bad it has a 4 gallon tank ,full exhuast title and much much more. I dont have that much money though