[arthurmoto]

Hi everybody! There is new build from Ukraine. I am talking about Yamaha XT660X that should be lightened, with new suspension and in YZ trim. So first of all it was stripped to the frame. Subframe was cut off and new one was fabricated with intention to use YZ450f 2010 plastic. It is detouchable now. I have YZ forks and custom made Ohlins shock with remote canister. New upper shock mount was made. I like new style aluminium swingarm. Front forks on photo is just temporary one. And you can see new mounts for ATV YFZ450 radiator and for Scotts stabilizer.

 

[Tinsnips]

What year is the donor bike? What weight savings do you estimate the subframe is gonna give you?

 

[arthurmoto]

2006. New subframe will not save any weight. It is made just to accomodate new YZ fenders and seat. I have highly modded XT660R Rally and it weights 192 kg with 19L of gas. I'll try to use the only necessary parts to avoid fat but have to use some protection.

 

[Tinsnips]

Nice. Looking forward to progress here.

 

[sotiris YAMAHAXT640F]

Νice work..the one and only one XT660F

 

[arthurmoto]

OK friends! Sorry for offtopic but we have the first day of the war. I live in Zhitomir, the town with 300000 population not far from Kiev, Ukraine. At 5.30 A.M. I was woken up by fallen rockets. Our beloved airport was destroyed. And rockets and bombs were fallen the whole morning in many-many places all over the country. I am proud of our military forces that stopped russian army almost everywhere. I have two days ahead to finish deals and to join our army. Talk to your friends and neighbours and tell the truth that we are fighting for our friedom against one of the most powerful army in the world. And 400 of their corps will become a good fertilizer for our agriculture. This was day 1.

 

[arthurmoto]

Hi everybody! I am from Ukraine and we have got russian invasion here. I live 120 km from Kiev in the town called Zhitomir. We have a lot of missile and avia attacks here but thanks God and our army forces russians were forced to leave our region. Obviously there was a delay in XT660 building but now I am near the finish.

 

[arthurmoto]

You can see KTM 640 carburetor. The reason is that from the very beginning there were only frame and engine. So I decided to use carburetor instead of EFI. I reckoned that ignition from XTZ660 1993 may be used and after all I was right. You can just put flywheel, generator and CDI in modern XT660 engine without any modifications and it will work! My customer changed his mind to build ultimate supermoto towards town commuter. I don`t like this idea but why not?

 

[arthurmoto]

Some words about KTM carb. It works nice from idling to 3/4 throttle but needs larger main jet. Stock one is 172.5. I have 180 to try tomorrow.

 

[arthurmoto]

Exhaust is from CRF450. Air filterbox is made from steel and YZ air filter with cage are used to not restrict airflow. I like carburetor even more than EFI because of sharp throttle responce. I have another XT660R that is used for rally racing and I am the owner of RallyCup of Ukraine-2021 on this bike and tried to make different modes. Now I think it could be interesting to try FCR-MX41 carb.

 

[arthurmoto]

Shock spring rate is 120 OEM, but I install 170 Nmm instead. Ride is more like on supersport bike now. And Ohlins absorber has comp and rebound clickers now.