Installing A Big Bore On A Zuma BWS 125 (155cc)
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- čas přidán 25. 01. 2016
- Ever wonder what it takes to install a simple 155cc bog bore, upgraded camshaft, and larger injector
Well watch this video it will show all the steps to install one. You will still need to look in the service manual for more detailed instructions, and torque specs.
Special tools needed
Torque wrench capable of doing 15ft lbs
Slide hammer
impact driver
P3 philips screwdriver and driver tip for impact gun
feeler gauges, special valve adjuster tool (part# can be found in service manual $4)
along with basic socket set, hammer, rubber hammer
I do use small scissor lifts around $60 on ebay
highly recommend at least 1 for supporting the bike as you can adjust the height very easily to match the centerstand height
And a way to strap down the front of the bike you dont want to risk it falling over during the work. - Zábava
Dude - totaly needed this. Im doing the RC158 BBK series now. THANKS!
Excellent video, Mike. The work that was done was shown so clearly. You did a good job. Thank you for sharing. 🛵🛵🛵🛵
Thank you for this, I’ve had a malossi big bore and Camshaft laying about, for about 4 years so just decided to do it while watching this video and it made it so easy for me so thank you
Dude thanks a lot for the upload man, this will seriously help out as a reference in the future.
Great job buddy. God bless you. Just make sure you teach others what you know and your skills and you'll become inmortal.
Awesome video! Thanks for sharing your knowledge!
Awesome video Mike ! 👍🏽👍🏽👍🏽
Amazing job
Awesome how too video!
excellent video!
#Thankyouforeverything ⛽
By maintaining the same 125cc head, the compression ratio increases from 10: 1 to 11: 1 so the engine will also have more force or torque. On the other hand, the power will be the result of the increase in displacement, camshaft, greater contribution of gasoline + air and exhaust.
You look like you have a lot of experience doing this. I'd love to find someone to upgrade my scoot !
My Zuma 125 exhaust valves got the leaking problem, without enough compression
pressure to start. Still don't know what caused the valves leaking.
#ThankyouForEverything
Thanks for the video. What kind of injector did you install and whats the difference of mph??
#ThanksForEverything
What do I need to look up to buy that slide hammer attachment lol I see “hook” attachments on Amazon but they don’t have the space in the middle like yours does to grab the bolt.
#thankyouforeverything
I couldn’t stand it! After watching this video like 10 times, I ordered the 158r bbk from rcscooters.com thanks for the great how-to video!
How’d that kit work out for you? I’m thinking about getting soon.
#Thankyouforeverything
#ThankYouForEverything 🛵💨
Did mine and air is coming from my air intake instead of creating a vacuum
Where did you get that Multi-piece clutch cover?
What city are you located in? I could use an upgrade like this on my scooter as well.
Plz bro what is the size for this cylinder
Where can I find the fuel rail from?
Great!! I'm about to start the same job too. I replace the old cylinder (and head), with a 59 mm one. Can I ask you where did you find the increased injector? Have you replaced the control unit? You will be a great help to me. Thank you.
hey you can buy the parts from rcscooters.com reliable vendor for the zuma 125
Great video. Thanks for sharing :) It's been a while, since the upgrade, how have you been enjoying it? speed? Power? how is it?
Paul M hey to answer that question its my zuma that he worked on. top speed is 67 but with extra other upgrades to transmission case. its good i love it and it keeps up with traffic in the city.
Mike are you still making these? Or maybe still have one you’d sell?
Where did you get the larger injector from?
Great video! Can I ask you what kind of tyre do you mount? I mean which brand! Thank you:)
How did you install the piston and the rings?
yeah I had to cut out a lot of stuff because the video would of been way to long
its like any engine, rings go in a certain direction, certain order and gaps need to be staggered a certain way. All of this is in the service manual, and should be pretty much the same for any 4 stroke small engine wont be too hard to google search it. If you order the big bore from rc scooters they will install the rings and the piston into the cylinder for you when they ship it. So it does save you some work because it can be hard to pinch the rings with your fingers and carefully slide it into the cylinder and hope not to break them all covered in oil
Mike, Can you tell us where you got that slide hammer from?
Harbor freight 2lb slide hammer
Hi :
At 6:48, Is it counterclockwise to remove this bolt ?
Is there any way to remove this bolt without the impact wrench ?
you don't need an impact, but you will need to keep it from spinning to remove which is hard to do
so its way easier with an impact
plus when you go tighten it back on, I used a very small impact drill again because its easier to tighten
Don't use the large impact gun I removed it with because you don't want to strip it.
@@mikegigabyte what size is bolt to remove @8:17
@@tyleravis7362 8mm
@@fatguymaneater Thanks; i was able to get this done 8 months ago and have put over 600 miles on my 158r kit!
@@tyleravis7362 sick! I’m doing mine soon🤙
Why buy something small and try to make it fast? Why not just buy something a little bit bigger?
Why buy a fast car and make it faster? Why buy a slow car and make it fast? Small bore bikes going stupid fast is fun.