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252 Posts
I am going to start thread of my 225 build. But it will Go quiet for a while - I can't imagine myself getting to it sooner that next winter.
Keep in mind I'm building this out of my TW125 en EU.
Hehe, in the end I should have 225ccm bike, which weighs with me on it 225 kgs
maybe some Day even 22.5 hp?
Most of the parts arrived. I will go with xts long range trans, xt225(01-07) crank and timing chain and valve gear - I want the supposedly stronger "silent chain". I ordered new but cheap replacement cylinder head from ebay for yfm250 complete with valves, cam and everything except covers. It's not yamaha genuine, but it has ball Bearings on both ends of cam - 6005 and 6202.
One upgrade I want to make. To. The head is put rocker arm springs in place - just as the xt225 has. Some Guy on FB pointed that out. It should be quieter with those springs - #10 in pic.
Actually two upgrades - I want to do some slight porting .
Next thing we'll see what about timing chain sliders/guides, since they're different for the DID SCR-0404 SV 104LE timing chain.
Piston and cylinder I purchased very cheaply from china - set for ttr225(70mm bore) . First I wanted to. Go with yfm250 set (71mm bore),but then I found out the yfm has lower compression ratio - 8.7:1 as opposed to tw and xt - 9.5:1
As for carb I want to try XTNG carburetor - truly a lectron clone for arounf half the price.
Maybe I'll try it first with tw125 oe 24mm carb, but I don't expect it to work very well, atleast not in the upper rpms.
And last a question. I think I have read the OE 34mm carb from xt/ttr doesn't fit. Does anyone know why? Frame clearance?
Keep in mind I'm building this out of my TW125 en EU.
Hehe, in the end I should have 225ccm bike, which weighs with me on it 225 kgs
Most of the parts arrived. I will go with xts long range trans, xt225(01-07) crank and timing chain and valve gear - I want the supposedly stronger "silent chain". I ordered new but cheap replacement cylinder head from ebay for yfm250 complete with valves, cam and everything except covers. It's not yamaha genuine, but it has ball Bearings on both ends of cam - 6005 and 6202.
One upgrade I want to make. To. The head is put rocker arm springs in place - just as the xt225 has. Some Guy on FB pointed that out. It should be quieter with those springs - #10 in pic.
Actually two upgrades - I want to do some slight porting .
Next thing we'll see what about timing chain sliders/guides, since they're different for the DID SCR-0404 SV 104LE timing chain.
Piston and cylinder I purchased very cheaply from china - set for ttr225(70mm bore) . First I wanted to. Go with yfm250 set (71mm bore),but then I found out the yfm has lower compression ratio - 8.7:1 as opposed to tw and xt - 9.5:1
As for carb I want to try XTNG carburetor - truly a lectron clone for arounf half the price.
Maybe I'll try it first with tw125 oe 24mm carb, but I don't expect it to work very well, atleast not in the upper rpms.
And last a question. I think I have read the OE 34mm carb from xt/ttr doesn't fit. Does anyone know why? Frame clearance?