Zipper’s 124/128 M8 SLEEPER BIG BORE KITS
$0.00
124/128 M8 SLEEPER BIG BORE KITS
FOR 2017-2023 1st GENERATION M8
No replacement for displacement, right?
Our Sleeper kits easily turn your 107 M8 into a 124, or your 114/117 M8 into a 128 inch powerhouse! Kit includes new 4.25” bore cylinders fitted with Zippers-designed forged pistons, Red Shift 468 or 472 cam, Red Shift Dual-Piston tensioner with offset drive gears, quikee pushrods and chrome or black covers, new cam bearing and gaskets. Incredible power gains with stock heads, even more if you add our Stage II blueprint headwork!
Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.
Zipper’s is here to help, if you have a question(s) please scroll down and fill out the form and hit send. We will review your question(s) and we will be in contact.
Paul Harding –
Amazing. 114 to 128. I already had done the cam chest with a Red Shift 468, and some Feuling and S&S parts. I have 64mm tb and intake, and 7.1 injectors, as recommended. Its faster, but even better is that this bike doesnt know when its on a 20% grade. I think i could pull my rv with it, now. The folks at Zippers were awesome in helping me. They never tried to sell something i didnt need. Thank you! -PH
Jason Meenach –
I recently had my local independent shop install the zippers 128 sleeper kit on my 23 SGS. What I love the most about this setup is, it can be as tame as you want it to be but at a twist of the throttle she pulls hard starting at 2K RPM all the way to 6K RPM. My gas mileage is still averaging in the low 40’s. It’s a great combination of touring and power. I can still tour the states without worrying about having to stop for gas every 150 miles and I can absolutely rip on her when I feel the need. It’s honestly the perfect setup for my style of riding. But if I wanted more power, I’m going to ship out the heads to have zippers do their stage 2 upgrade and go with their 548 cam. But as she sits, it’s pulling 135HP & 152TQ using their redshift 468 cam. I’m a zippers customer for life.
Darrell may –
I hear good things about this product I have a few friends with it plus I’m a traveling tall subscriber and it’s all he uses