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questions about putting 180cc or 200cc

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9.3K views 6 replies 3 participants last post by  noelchris381  
#1 ·
I would want get out more power from my yzf. I have 2010 yzf with 25k km on clock. I'm looking at naraku cyclinder kit with head. Naraku have 180cc and 200cc kits and they cost about the same.
And I have some questions about engine.
What would be better 180cc or 200cc?
What happens with fuel injection does stock fuel pump and injector is OK? Will malossi force master 2 do the job?
Stock crankshaft with bearings will hold that power in long term like 2 years?

Naraku 180cc kit : Zylinderkit Naraku 177ccm 62mm Keramik für Yamaha YZF-R WR, Xmax 125 kaufen | SCOOTER-ATTACK and head Zylinderkopf Naraku 21/23, 62mm für Yamaha Xmax, YZF, WR 125 kaufen | SCOOTER-ATTACK
Naraku 200cc kit : Zylinderkit Naraku 200cc 66mm Keramik Yamaha YZF-R WR / Xmax 125 kaufen | SCOOTER-ATTACK and head Zylinderkopf Naraku 22/25, 66mm Yamaha Xmax / YZF / WR 125 kaufen | SCOOTER-ATTACK
malossi force master 2 fits on yzf? : Ungedrosselte CDI Ungedrosselte Zündeinheit Malossi Force Master 2 Yamaha X-Max / X-City 125cc ie Euro 3 kaufen | SCOOTER-ATTACK
 
Discussion starter · #3 ·
Thanks for your answers! They helped me a lot! ;)

fuel pump should be fine. Stock injector runs out of duration on a 180cc so you need bigger. 160cc/min injector seems to work well but it will need mapping for the new injector..

How big is original injector is? Can you show me some website where I can buy 160cc/min injector?



The FM2 should do the job more or less. It has no wideband input or autotune option so will need a dyno tune though which is $$$ (and another each time you change something). Downloaded maps are an ok start but will never really let you get the best performance and that's a lot of money to spend to only then get half a result by not bothering to actually get it mapped properly. PCV + Autotune is a very nice and flexible setup which means you can skip the dyno but it's $$$

This would be the nicest and the most flexible solution? Yea it cost a lot but in the end it would be worth.
 
Discussion starter · #5 ·
I looked at scooter attack there are some aftermarket heads. There are naraku head 21/23mm valves and for 62mm bore (177cc) Also there are naraku head 66mm (200cc) with 22/25mm valves. And now I have question about stock head, how big valves stock have? There are needs to change head?
 
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