Stroking Up My Yamaha SS2/F1ZR

My new project for my ss2 bike or some other countries call it F1ZR. Stroking it up to increases engine capacity, torque, and performance. I actually done it already by customizing a crankpin to an offset crankpin by 2mm.The 2mm is adding to a half stroke, so full stroke of d crank is 2mm x 2 = 4mm. Adding to d initial stroke of 52mm which increase the total stroke to 56mm.


For newer model bikes, there are aftermarket offset crankpin. which mostly made for fourstoke bikes. only a few for 2 strokes. And the ones that i know that has it was yamaha 125z and yamaha rxz. with ofset up to 1.5mm only. Since my bike is old model and there no market for racing parts as such for the model.

My initial project fails since my customized offset crank pin is not strong enough. The material used to make it was not as strong as that original crank pin. The performance outcome was superb but it didn’t last. Went a few rounds on d road with it and it wore off by 0.5mm. Doesn’t sound much but enough to make my engine sounds like and engine with broken bearings. Or worse. Then I have to dismantle my engine again and install d stock crank again. :S. cost me quite some bucks but it’s part of the R&D for this.

These are the plans for the failed crank pin

Initial planing.

Done

 On one side of the crank

 Grind the bottom conrod for clearance

  

Half circle bearings

Conrod on d pin

 

Custom made 1.5mm metal spacer

 

 Spacer done and on the block

 installed half crank in the crankcase to chek for clearance and fittings

 2mm increase of stroke

0.5mm clearance from d wall

The plan was a failure. But i can tell that it performs damn awesome. coz before it failed. i can tell that it was much better in response and d feel of d engine. 4th gear was as if im still in 2nd gear when riding Too bad d material didnt last. Few rounds and d custom crank pin worn off by 0.5mm. Heavy knocking sound in d engine and cant ride with that kinda engine condition. So i have to install the stock crank again.

But recently i found out a new method of increasing the stroke instead of making an offset crank pin. I figured that closing the original hole of the crankpin on the crankshaft and redrill a new hole that adds d stroke by 2mm as well. the below pic explains it.

I drew this plan to show how the stoke of the crank is counted. and to see how to relocate the crankpin hole.

example 1: 

example 2: notice d crankpin on both crankshafts

This process takes time and money. So i cant really make this as soon as i wish. It depends on my budjet. The outcome of my plan will be superb and performance wise will be insane. Theoretically, coz by increasing stroke, it increases the displacement of the engine and d torque and so thus the power. From 52mm stroke to 56mm stroke is a big improvement in displacement and performance for my bike. since im using a racing cylinder block with 56mm piston, the finish stroked crankshaft of 56mm will make my engine as a "squared engine" which means that i have my stroke and piston size same in measurement of 56mm each. This means my bike will have power in Low RPM range, Mid RPM range, and High RPM range. all in one pakkage. having "Over Bore Engine" will provide better Mid RPM range and High RPM range only. While "Over Stroke Engine" will provide Low RPM to Mid RPM only.

Im going to do an over bore as well soon. with piston size 60mm. increases displacement of the engine and performance. Originally my engine has 52mm stroke and 52mm bore which means my displacement was 110.4cc. Now im using 56mm piston which means 128.0cc. Once i have my stroked crank will be 56mm stroke and 56mm bore equals to 137.9cc. and once i get my 60mm piston installed at that moment the displacement will be 158.3cc. Big leap from 110.4cc to 158.9cc. In 2 stoke it is a very big difference. and it will be mad performance for a small bike with a big displacement engine on it. 

How 5 months and 5 days ends.

Few days ago i just came face to face with a very painful break up ever. Seriously brought me down to the lowest point of my life. My whole dreams, hopes and plans shattered. This may seem like a diary or so to some. But this somewhat helps me to recover a bit, though not fully.

Started like 5 months ago. No point of me mentioning the detail of the beginning. Went so well throughout the period of being together, though some arguements and missunderstandings accur but we settled them eventually. And it was not easy. Everyone thought we were perfect and stuffs whilst most don't see what happened behind the scene. We went for day trips, romantic dinner, attended wedding dinner together, outings and stuffs. Seems perfect to most. Well i hope it was what people see that last forever and get rid of those issues we were going through together that seems so difficult to get it settled.

It was my fault most of the time that i wanted this relationship to be so perfect that i neglect her part and her preferences. I was stubborn. Both were to be honest, in many ways. Since problems after problems keep on piling up. I guess she cant take it anymore.. She gave up. I did not. Somehow still hoping but yet i need to start thinking for my own good. No point forcing a relationship anyways. I do regret those mistakes i made. I was selfish that I made decisions through my own point of perspective. Thinking that what i said was often right and yet sometimes i was wrong. Though we were 4 years in difference of age. i guess i'm a bit old kinda mentality. Different era, those kinda shits.

I was somewhat obsessive and sometimes over concerned about her well being. Seems that made her feel uncomfortable in someway. This break up gives me a huge knock on my head making me realize what shits i've done and how things should be done to make things better. Well, its a bit to late for me. Should have thought of it earlier.

I was seriously down, devastated, upset, angry, shocked and so on, when this seems to be for real and i've got no more chance to make things right for us. A friend of mine suddenly message me on facebook, saying she is somewhat going through the healing period of a broke up, shared me some very helpful articles. Made me realize stuffs i never did. I'm seriously glad that she shared me those article. Made me feel better and think more wisely then i was before. Those articles was about how to deal with situation that im going through; break up.

As i go through reading stuffs related to my situations, gave me a brighter idea of what to do. Well, begging to continue back this broke up relationship was not one of it. though i wish there was a way of doing so. And so far i'm doing good at following the suggestions on dealing my situation(since a few hours ago to be exact). Its a good start at least. Better than nothing.

I was seriously down. Cried like hell i have to admit. Though does not seem right for a guy to be this sensitive and shits. I know i love her so much and the feeling was real. Ending up like this will surely bring down the toughest guy in the world as well if it meets exactly as my scenario. Recovering from this is very very dificult. Ive never fell in love with a girl this badly before. Seriously. And despite that feeling i have till now. I cant force something that will never happen. If she is so firm with her decision. And i cant do anythng else anymore to chnge her mind.

I Love You so much Gigi Chua Hui Chei. I hope the best for you. Ive made mistakes in life and letting you go was d biggest one yet. And I'm trying my best to recover from this.

12 Uplifting Quotes About Moving On After A Break Up

"Moving on,is simple thing, what it leaves behind is had." -Dave Mustaine

"Watching you walk out of my life does not make me bitter or cynical about love. But rather makes me realize that if i wanted so much to be with the wrong person how beautiful it will be when the right one comes along." -Anonymous

"Life is like riding a bicycle. To keep your balance you must keep moving." -Albert Einstein

"You can never cross the ocean unless you have the courage to lose sight of the shore." -Christopher Columbus

"Love is never lost. If not reciprocated, it will flow back and soften and purify the heart" -Washington Irving

"When one door closes, another opens, but we often look so long and so regretfully uppon the closed door that we do not see the one which has opened for us." -Alexander Graham Bell

"I was never one to patiently pick up broken fragments and glue them together again and tell myself that the mended whole was as good as new. What broken is broken, and I'd rather remember it was at the best than mend it and see the broken pieces as long as I lived." -Margaret Mitchell

"The brightest future will always be based on a forgotten past, you cant go on well in life until you let go of your past failures and heartaches." -Anonymous

"We must be willing to let go of the life we have planned, so as to have the life that is waiting for us." -E.M. Forster

"Letting go doesn't mean that you don't care about someone anymore. It's just realizing that the only person you really have to control over is yourself." -Deborah Reber

"Letting go has never been easy, but holding on can be as difficult. Yet strength is measured not by holding on, but by letting go." -Len Santos

"You gain strength, courage and confidence by every experience in which you really stop to look fear in the face. You are able to say to yourself, 'I have lived through this horror. I can take the next thing that comes along.' You mus do the thing you think you cannot do." -Elenor Roosevelt