Bought my Moki 1.80 used in a GP 74" Extra 300s 1.60. The past owner had 37 flights on it and swore by 5% nitro w/castor and the K&B 1L plug. He was right. After priming it starts with 1 back-flip and runs strong throughout the band.

I have a hard time finding 5% locally and will begin using Omega 10% as the manual says it's fine for my elevation (Denver.) I'll be sticking with the K&B 1L to see how things go with the change in fuel. I haven't tached it yet but the previous owner said he was getting over 9000 rpms on his 18x8 setups. I agree that those higher rmps arent needed and will be propping up a bit, likley to 19x8 for starters. If anyone is still interested in this thread, I will post my reslts with the new fuel and prop.