Freshman Rider
Currently Offline
Posts: 61 
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Nov 1, 2014 20:08:45 GMT -5
oh this is a fuel injected engine so it doesn't rely on vacuum pressure.
it's more like forced induction and this is a professional racing scooter that's been made by the Dunler racing team.
if anybody has any ideas on how to recreate this effect using a carburetor i'm all ears. i think a reverse turbocharging effect can be created by altering the valve timing
|
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Nov 1, 2014 19:13:14 GMT -5
Completely missed that thread; very interesting. Ive been using vac test forever - on cars & large cycles; tried on the scooter and was confused by the results. Your tests helped a lot\. You got basically what I was getting - and my thought about the engine valve timing being off, or whatnot, appears to be wrong since, i guess, these things just operate at very small vacuum levels. Surprised the vac reading drops to, basically, zilch at high rpm. ram air would solve that check this out, its a Yamaha Cygnus/Zuma/BWS engine with a Kymco head on with a ram air box fitted!    |
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Nov 1, 2014 13:19:09 GMT -5
I will let you know when i learn it. anyone who is important here can speak English.
anyone else is just a number. until they hit you on their scooter, then they are more important than you. even if it was 100% their fault, you will pay for it.
|
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Nov 1, 2014 13:15:44 GMT -5
the first time i built my engine i used a koso 124cc kit and installed the rings in the wrong order and the piston upside down. there were no markings on the rings and for some reason i thought the arrow on the piston face meant "this way up".
after putting it together and tightening the cylinder head down without a torque wrench i started her up. and it was so much stronger than the original cylinder i gave it a quick 5 minute blip around the block. the morning after there was a whole engine case of oil on the floor beneath it. DOH!
so i took it to my friends shop an we tore it down and figured out my mistakes. after inspecting the connecting rod for play i decided to replace the rod and crank bearings just to be on the safe side. that's one thing you should always do when you bore up an engine that's already got a bit of mileage on it. peace of mind.
|
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Nov 1, 2014 12:03:36 GMT -5
Ok so lets go back about 1 year. I had been living in Taiwan for just over a year and i had just got my scooter licence. I had a new job which was outside of the city I lived in and so it was time to start scooting. So I (actually somebody else who had no idea SHE was doing ) spent 25000NT (500GBP or 822USD) for a 2004 Yamaha RS100. (just google jog100 or xc100f)
This build sounds expensive, CCR. Is it? Also, if you don't mind me being nosy, what kind of work were you doing in Taiwan? it is an expensive build. but it should save money also, and add more value to it. I'm working here as an English Language teacher. but designing, manufacturing and building engines is the real reason i wanted to come here. i know my spelling and grammar is not [perfect on here, but i'm lazy and it would take too long |
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Nov 1, 2014 0:07:37 GMT -5
here ya go. this one best matches your description  and if i were to give it my expert opinion i would say the piston was upside down in the cylinder. (i did this myself the very first time i built an engine. mistakes like that are made by everyone on their first try. thankfully i had someone to correct my mistake at that time.) and /or the cylinder head was not torqued down equally |
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 18:34:50 GMT -5
this Yamaha had not been looked after for 10 years. somebody thought it would be a good idea to screw a carpet into the battery cover. and ten years of rain got into the battery, the frame and the wiring. :/ and when they realized their scooter only had 6 months of life left in it they sold it. i wish i had a say in the matter at the time. i was promised a 2011 kymco at the time  |
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 3:19:48 GMT -5
almost all of these videos are from Taiwan. i even recognize these places. the standard of driving here is disgraceful. and i see at least 3 accidents a day here on my travels. at least 3! sometimes there are even fatalities. i have seen some things here and been involved in my fair share of stupid crashes. they always seem to have an excuse for why they drove straight into me when i had the right of way and my light was green an theirs wasn't. first lesson to being a foreigner in Taiwan is that this is not your country, if anything happens and its not even your fault they can and will Fk you. the next person who touches my scooter won't live long enough to call the crooked police.
|
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 2:26:17 GMT -5
so here we have it.  this is what it looks like at the moment. no money to continue the build right now. the day it blew up was the day i lost my job because i couldn't get to work. harsh times i only work one day a week now and i'm struggling. i can't take on any more jobs either because of a lack of transportation. so the only way to finish this build and fix my life is to rebuild it properly with the money i get from my 1 day a week job. i vowed not to drive it until it's really ready. there have been so many problems caused by rushed jobs to fix it for work in the past that i just can't risk killing my 60,000nt dollar brand new engine for the negligence of others and the pressure of needing it ready for work the next day. overheating has killed 2 engines now. and mechanical failure due to negligence has killed it this time. this will be the last time this bike goes under the knife. i have other projects in my life need my time and money and this money pit has had enough . it's a vicious circle with this thing. i need it to get to work. and i need to go to work to pay for the repairs all the time. YAMAHA Taiwan if you are reading this, i hope all your children get Ebola.  Plans for the future. here is a sketch of what the bike could look like  and heres what the front intake for the radiators looks like....    once its ready i will make a fiberglass moulding and make a fiberglass front fairing out of that moulding |
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 2:00:06 GMT -5
|
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 1:49:07 GMT -5
so what progress have i made? firstly, i got rid of all the rust with a steel wire brush. then i coated it with 4 layers of the best quality spray can i could find. then i gave it 3 coats of clear coat just to be on the safe side. i want this bike to last another 10 years.  then my loom came.  i was not impressed with the build quality and i wanted a loom that looked a little more "cool as " while still looking professional. you know, like you should expect from a brand like YAMAHA. so anyway i came up with this. (picture doesn't do it justice. you will see later on)  after disassembling the engine case, cleaning it with acetone, and masking it off, it looked like this...  time for a bit of paint....   oh and those are all stainless steel fasteners because the YAMAHA ones are made of chocolate or something. they will disintegrate after a year and wont budge at all without impact tools. since i'm going for a water cooled build that stupid plastic fan and shroud will be gone and the magneto and right side case will be exposed. |
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 1:28:58 GMT -5
so now you are all up to date with the story. lets start the build. first thing to do when you are rebuilding or refurbishing a bike is to asses what you're going to keep and what you're going to bin of the original parts. so lets tear the bike down to the frame and check for rust    hmm yes plenty of rust. lets not worry about that yet. what about the rest of the parts  all the plastics are dead and will be replaced. the engine hangar is too weak and would twist under hard acceleration. a new CNC one is a must and so is dual rear shocks for this build.  front fork seals were compromised and oil was leaking. sent back to the factory for new seals and oil.  all the cables were recently replaced so they are fine. wiring loom/harness was completely Fkd since i got it with all sorts of dodgy bypass wires taped into it so a new one was ordered. so here's a list of the parts i need for the build. brakes, wheels, fairings, cnc forged crankshaft, water cooled ceramic cylinder, forged piston, 4v cygnus cylinder head, engine hanger, 2 rear shocks, right side swing arm with disk brake kit, temp sensor, wiring loom/harness, speedometer(LCD), camshaft driven water pump, 2 vino 50cc radiators, lithium ion battery, driving camera and GPS tracker. and a million other little things. |
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 1:05:55 GMT -5
|
|
Freshman Rider
Currently Offline
Posts: 61
Likes: 13
Joined: Oct 30, 2014 23:50:17 GMT -5
|
Post by ccr on Oct 31, 2014 0:48:05 GMT -5
|
|
|
|
my new turbo had arrived. 