I might need to get my 150 c.c. Yamaha Motorcycle engine rebuilt because it always smells hot and sometimes is smoky. It leaks oil considerably from the top, too.
I’m wondering if I would get much more power if I had it bored out to 200 c.c.s.
If so, would that stress the transmission and or chain? Or are the 150 and 200 cc transmissions similar or even the same?
Also, would the engine overheat or in some way be compromised in terms of reliability?
It’s just so hard to ride a de-tuned 150 c.c. motorcycle when I’m used to a 400 c.c. Super High Performance Suzuki Bandit (a bit anemic, but it red lined at 14,000, did 0-60 mph in around 6 seconds, topped out at 185 km/hr and cornered like no other, I could also have it wide open in 6th gear all the way from 30 mph up to 115 mph, with no protest from the engine, it was odd. It also had a first gear power curve like it was turbo charged from 6k to 12 k. MMmmm. ). My bike now is very functional, but I almost wonder if it should be bright pink instead of midnight black. JK.
Or at this point would I just be chasing rainbows because even a 200 would still be unable to give any kind of considerable acceleration?
I’m wondering if anybody has any input.
I couldn’t find this answered anywhere. I hope it’s not a re post.
well i had one of those FZ150 long time ago, and i wanted to do the same kind of things to the bike… back then it would have cost me around 15k ~ 20k… then its better if you change the rear tire and the chain and stuff like that… i tried one before i made my mind (i think you should do the same)… finally i was not happy with the possible result so i didnt modify the bike, i sold it and bought a Hornet 250cc (the best bike i have had with a small engine size) for about 120k, but on this days u can get a CB400 for about the same money, actually i know about one for sale… anyways just ask someone that has one to lend it to u and try it first…
as for me the problem is that i always want more power… i have a SV1000 and i want more (GSXR 1000 or CBR1000RR) :yay:
I think you will find it more cost-effective to buy a 400cc bike, or if you can’t be bothered with the licensing hurdles, a two-stroke. Unless you’re a big tall rider, test ride an RZ-X or NSR. Cheap thrills. Both bikes are a bit long in the tooth and may take a while to find one in good shape. It will be tricky to find certain parts locally.
I’m not sure if you’re talking about a single or v-twin Yamaha 150. They had both in the market.
FZ or FZR150: You can bore the cylinders a little as stated for a small bump in capacity. Better return on investment is fitting the crank and rods from the SRV250 to get to 250cc. Though the bike was not sold in Taiwan, these parts seem to be quite readily available. One glitch there is that this motor vibrates quite a bit more than the 150cc version. The SRV had rubber engine mounts to absorb this. The FZ/R150 does not.
SR150: Cam profile and valve size are selected for best response and tractability at low rpm. While it may be possible to bore it to 180 or 200cc, this engine requires a new cam, larger valves and extensive port work to achieve any real improvement in power output. Then the bike needs a disk brake in front and suspension work. None of this is IMO worth the money.
You might also look into the CPI SM250 if you are into supermotard bikes.
[quote=“redwagon”]I think you will find it more cost-effective to buy a 400cc bike, or if you can’t be bothered with the licensing hurdles, a two-stroke. Unless you’re a big tall rider, test ride an RZ-X or NSR. Cheap thrills. Both bikes are a bit long in the tooth and may take a while to find one in good shape. It will be tricky to find certain parts locally.
I’m not sure if you’re talking about a single or v-twin Yamaha 150. They had both in the market.
FZ or FZR150: You can bore the cylinders a little as stated for a small bump in capacity. Better return on investment is fitting the crank and rods from the SRV250 to get to 250cc. Though the bike was not sold in Taiwan, these parts seem to be quite readily available. One glitch there is that this motor vibrates quite a bit more than the 150cc version. The SRV had rubber engine mounts to absorb this. The FZ/R150 does not.
SR150: Cam profile and valve size are selected for best response and tractability at low rpm. While it may be possible to bore it to 180 or 200cc, this engine requires a new cam, larger valves and extensive port work to achieve any real improvement in power output. Then the bike needs a disk brake in front and suspension work. None of this is IMO worth the money.
You might also look into the CPI SM250 if you are into supermotard bikes.[/quote]
Redwagon is absolutely right. You won’t get enough power (or at least the power you are looking for) from a 150 bored to 180-200cc on your 4-stroke. You will get a little power but it won’t be that noticeable. Remember once you start putting more power into your stock engine you should (will) need to start making other upgrades like brakes, suspension, and tires. It is a money pit, but hey I love it!!!
If you have an FZ/FZR this is your best option. I think you can find a used SRV250 engine and have it shipped over here from Japan for about $50,000nt. I know many people that specialize in this market and can help you get all the parts and install them. Many guys are running this setup at the track, parts are ready available, and a lot of them have bored the SRV250 up to a 300cc. These 300cc’s are monsters, fast and still light. If the rider is good, they hang with the track NSR’s.
SRV250 Eng/Trans combo is the way to go if you’re set on keeping your Yamaha 150…(although we still dont know what model you’re talking about FZ/FZR/SR/???)
I have a 180cc FZ and while i didnt notice a difference from my 150cc (which grenaded and needed reboring anyways) I did notice a bit of improvement in my friend’s 204cc FZ, but nothing incredible. And i felt that added engine size caused strain on his transmission over time.
The SRV 250 Eng/Trans combo would be your best bet because they’re made together and putting a bigger engine into a smaller body was Carol Shelby’s recipe for success…so you cant lose. They’re just a bit expensive. You could always go for a new CPI as mentioned for around 90k nt now im hearing??? Up to you, or a new Honda CRB150r. Those are fast as hell, still light, and small and maneuverable.
My Yamaha is an SR I think, it’s the one cylinder model, sport touring design. Dual Drum brakes very stock, straight and good looking.
I think the 2 cylinder models are a bit on the crotch rockety side, which I can’t handle because I have a bad back, I’m also a bit tall 6’2" so I’ll probably need to stick to bigger sport touring bikes, as they’re by far the most comfortable.
I think it’ll be best to just stay with the 150 if a 200 isn’t considerably more powerful and equally reliable.
omerojs wrote
Damn! An SV 1000! Sweet. Still wanting more power, he he he.
Maybe I’ll try to just look for a new bike, like that 250 hornet, it’s just so hard paying Taiwanese prices here. My Suzuki Bandit 400, which was friggin gorgeous, Looked like a 5 foot 2 Asian playboy bunny with black stockings and form fitting red lingerie. Boing!! Only cost 2,000 in america, so paying more for less here is really hard to do.
By the time you’ve fucked around with that weedy 150cc machine to get anything decent out of it you will have spent enough money just to buy a CB400. With the economy as it is people are desperate to get rid of toys like this so you will easily pick up a bargain.
I suggest the CPI SM250, cheap, locally supported, very comfortable for tall people, white plate, super agile, sexy and tons of giddyup on city streets.
It’s lightweight and agility combined with it’s low end power and great handling manners makes it a pleasure on mountain roads too. My wife even prefers being on the back of it more than she did my Gsxr.
Sitting up tall gives me such a great field of vision and the power at low RPM always puts smile on my face when I just blip the throttle and blast past the scooterboys and terrify them with my loud exhaust note, even the cars hear me coming and make way, i’m surprised that standard pipe is legal with all the noise it makes hehe.
Do yourself a favour and get a test ride at a local dealer. For less than the second hand imports you get a new bike with a warranty and great support.
I was looking at the CPI 250 pictures on the internet and started thinking/salivating.
Are there any cool places to ride an off road/ dual purpose super motard bike around? I’m approximated to the Taoyuan ambiance.
Also, where can I take a test drive? What are the approximate costs? I looked around on the internet and couldn’t seem to find much info.
I remember the 250 Yammer Hammer offroad bike that I used to scream around the mountains of the pacific northwest on. Damn! That old school bike, a flask of _______ and a ________ of ________ were THE portals to ZEN. I remember watching ridges materialize, then wash below as I’d fly like a phantom over the skeleton of the mountain ranges. I could spank any 4 wheel machine, and I mean ANY 4 WHEEL MACHINE on those particular roads. It’d take a NOS powered tank to keep up with me. Then one time I rode a 600 cc off road bike around the Hoodoo Mt range. GOD DAMN! At one point the bike damn near pulled out from underneath me. I looked back and realized that I had been peeling out for around 100 meters or so, then came across a patch of better traction and, whew! Hang on!
I want to clarify what I wrote earlier. I implied that I drank and drove on a motorcycle but actually what I did was ride, stop, take a few sips and then walk around for a good while.
I’m actually against driving or riding if not near 100%. One time I was simply angry and crashed twice in one minute.
Sorry for the ambiguity. I didn’t realize that drinking and typing, which is what I did, could be so obnoxious.
I was trying to ask for cool off roadish type places to ride a dual purpose/motard bike around near Taoyuan county.
:yay: