Testarossa's 78 KZ1000 Fighter Build

T-dub in the house

MMM new pistons. Tasty! Getting closer to the 1075cc upgrade every day. Lets see, 10.5:1 MTC's, APE K410's and VM29 Smoothies. Sounds like a good combination for a street bike to me. Anyone have a recommendation for valve sizes? Are the 29mm carbs going to hold this setup back? Eventually one of these heads will get a stage one port, but I'm itching to get this setup installed this winter. The blue streak will get a much needed power boost.







What's up Tyler? Did you figure out where you were moving to?

Those are some nice pistons. I love nice fresh pistons.

Turns out I'm moving to...nowhere. Staying here in NL for now. Should be able to get out at the bike on Sunday, hopefully my Z1E order will be here by then.

cool...i have never seen them in truck beds ,,where do they go....

are u sure there 10.5:1 ? they look tall in the pic ?
stock valve size will be best for that combo. it will keep the torque low where u want it. u have a zx10 for the high end. keep the kz running where it shines most.

Keen observation Mark. Joe at Pit Stop sells two versions of the 10.5 to 1 pistons. These are for longer duration/higher lift cams. He says not to use them with the stock cams as they will provide too much compression for a street bike. I told him that I wanted what ever set that would be best with those K410 cams, and this is what he said to use.

Don't worry Craig, I'll show you where they go, and no, it's not in my truck bed.

yeah yeah nice indeed....every one is snapping up those other piston kits too and i can see the savings...i figure i will be doing a bit more specific purchase like you did..and if they sell out of those japan sets no big ...i like the pop tops and had some in an engine with 29's.....way fun.....nice...are you doing any coating...how is the finger....

Adam stopped by my house Sunday...rode a bike and the kids ran around....was here a good bit....nice guy....he rode the MKII

edit:

i kicked myself right after they left for not taking a picture or video clip with him on the bike(in flip flops) or us next to the bikes ect....i did not want to get the creepy camera out when they pulled up, and we were just meeting and his wife and kids were running through the garden ect...i all but forgot i had the cameras in the shop loaded to get a bike pic with him....next time...p.s he is the holder of the Moriwaki tip and titanium mid pipe from a daytona Z1 now...let him make it work on that hybrid carbon beast....

when are you doing the engine....there may be a few of us doing small blocks this winter :ohmy:

nice pistons there sir !

that should be a very good running combo.

i cannot believe that craig slipped on getting the evidence on adam .riding in flip flops .

jee wheel lickers wally!!!!!


leon

testarossa wrote: Keen observation Mark. Joe at Pit Stop sells two versions of the 10.5 to 1 pistons. These are for longer duration/higher lift cams. He says not to use them with the stock cams as they will provide too much compression for a street bike. I told him that I wanted what ever set that would be best with those K410 cams, and this is what he said to use.
quote]


Wow! Never heard that 1 before. i hope u dont get any ping.
You may want to reduce your squish area to help.

They are just standard 10.5:1 MTC pistons, so they will work great.

It should be a nice setup when it is done.

Pit Stop sells the same pistons with machined domes for stock cams.

Their sales pitch for them drives me crazy, although I understand what they are trying to achieve.

10.5:1 pistons are 10.5:1 pistons, regardless of the cams.

The 10.5:1 is the static compression ratio, which is can be derived using math. It is based on chamber volume and is not affected by the cams or cam timing.

I'm with tachrev, all of that doesn't make any sense to me. Compression ratio is compression ratio, cams have nothing to do with it. They might have deeper pockets to clear the valves due tot the greater lift/duration. In which case, if they're machined from normal MTC 10.5:1 pistons the static CR would be lower as you've removed material. I think Joe is either full of shit or you heard him wrong.

Sorry. i didnt mean to open a can of worm here. not to worry , it probably just that they look dif in the pic.

TDub. longer duration cams WILL bring down the compression ratio. thats why u need more compression to run bigger cams.