Planet Minis

Nooblette

No the legal limit according to DMV is OVER 149CC
here is an excerpt from the motorcycle handbook itself or you can look at page 3 yourself here:

http://www.dmv.ca.gov/pubs/dl655/dl665mcycle.pdf

Nooblette

I never got cited... It was still 2 stroke and perfectly legal. He checked my license plate, cross referenced to my vin, checked insurance, license, reg, tire tread depth, light height to make sure they were high enough off the ground... EVERYTHING!!! then he said he was going to give me a warning but wouldn't tell me what he was warning me about... then he left... What a joke

Manimal

Well then, I stand corrected. Thanks!

fwiw, last time I browsed the DMV handbook was in 06, or was it 05? (lol)

Manimal

I see LEO's all the time while riding my YSR. Bummer that you got pulled over for no reason, or maybe out of curiousity (making sure your bike was legit) *shrug*

Nooblette

my bike is 149.4CC LEGAL by .4 of a CC

shawnbassett26

i wonder if its regestered as a 49cc do the laws change if you have a 150cc? From what i understand if its regestered/titled as a 50cc it must obey 50cc rules. not that i care if you ride your on the highway leget ot not. Because i will regaurdless. just a thought. What do you guys think?

Nooblette

As far as I know my registration does not say ysr50 on it. It says make and model but nowhere does it say size. Also if you look on the sticker from the dealer it is classified as a "motorcycle" not scooter not motor-driven-cycle MOTORCYCLE. As far as Im concerned there is no way for a police officer or CHP official to know what kind of engine needs to be in it. Furthermore if you do a good job at mounting in your engine the officer wont even suspect a swap I got my bottom fairing on and you cant even tell anything is different. One guy who claimed to work at a local motorcycle shop said: "I didnt now the YSR came in a 4 stroke model except for the bigger ones." Then i smiled and said "they didn't"

shawnbassett26

my title says yamaha ysr 49cc motorcycle. i also have fairings, but my motor says honda. im sure ill never have a problem with cop giving me a hard time. Also your motor looks really cocked back (too straight) did you meen to do that?
~Shawn

Nooblette

What does your registration say? I am just curious because i dont have mine with me at the moment

Yes I meant to do it a little. I knew I was going to be getting into the high speeds so I needed to get the engine as far forward as I could which meant tilting it just a bit. It has been fine and it worked out a little better this way to fit in my carb and K&N air cleaner along with the wiring on that back mud flap... Every inch counts, but mainly to add weight on the front tire. 1" forward =about 3 lbs more on the front wheel according to my friends calculating. I should hit 85 before wobbles, but I still plan on getting a steering dampener... know of any good ones?

shawnbassett26

I dont think you understand what im saying. I think your motor is too straight. the motor is an upright motor up not that up right. they are suspose to be at more of an angle /, To fix your wabbles you need to upgrade suspention, ballancing and tires. Have you done the second spring mod? Are you running a frok brace? those will help you more with sability more than a rotating mass inched foward. If it work (as i can see it dose) its fine, just wondering if you ment it to be just about srtaight up and down? not saying there is a correct way of stuffing a 4 stroke in a ysr. mine is a more (stock) position. Again im by no meens telling you yours is wrong, it looks good.

Nooblette

yes I understand what you are saying. I did it so I could move the weight forward and so the exhaust would still fit while that far forward. I have the upgraded front forks just not a fork brace yet. I have not got wobbles yet but I know that lack of weight on the front can cause pre-mature speed wobbles. My buddy that did all the calculating builds Bonneville cars for other people and has been looking into starting a 50cc Bonneville streamliner. He has been a great help in all this and is very knowledgeable. I understand what you are saying and I know its not supposed to be that vertical, it is just parallel to the front brace for exhaust reasons. It still may be brought down a little now that my exhaust is done and it has a little extra room

The Nutty Professor

When he stopped you and found out you where legal he felt stupid so he kept looking hoping to find something. When he didn't he used the old lame ash standby "This is just a warning. Next time I'll stroke you one." A honest cop would have said "Man sorry about that I thought you where riding illegal but now that I see you're good have a nice day. But be prepared for other cops to stop you because I'm not the only one who'll think you're not righteous. Later dude." End of conversation.

Nooblette

I hear ya, I just rode the YSR to work about 40 miles away. A police motorcycle cop was real cool, he split lanes right up to me and asked me about my bike. we chatted at 3 intersections and he drove off and I continued to work.

Nooblette

I played around with the 17 tooth front sprocket and the 15 tooth front sprocket last night. I thought I would like the 17 tooth better but it turns out the 15 tooth is best as first gear is too high with 17 Top speed today was 90MPH according to my brothers kz650... that was 8,500 RPM with 15-26 gears and 130/70/12 Michelin tires. It wasn't even as scary as I would have expected. I am thinking about putting a bigger engine in it still in a couple of months. I have a few 2 stroke motors ready to go or I may go with a 250cc single cc water cooled engine. Not sure what route to go yet.... I may just keep it though because everything is GREAT!!! I love this bike!

The Nutty Professor

Dude if it's a lovely ride leave it alone and enjoy it. Put a peaky 2 smoke in there and you'll wish you hadn't. Don't get me wrong I like 2 smokes but I don't like the headaches.

justchilllin

hey i am new to this site i am formally a member to planetminitrails.com but check out my project let me know what you guys think next step nsr suspension setup this is the link to the project from day one.

Manimal

I agree. However, it's your bike, your decision.

IMO, 90mph with a 150cc Lifan motor is way more than I can ask for. For my areas of riding, that is plenty of power.......looks like I may be convinced into going with the 150cc motor instead.

What sprocket combo did you use to hit 90mph?

Did you use the Lifan clutch and throttle cables? If so, how is the fit? If other, please specify.

Nooblette

I used lifan clutch and clutch cables by installing the line from the lifan master to the YSR caliper. It was a bolt in application. I had an entire bike so I just took the cable and levers as well... as far as the system is concerned it is all lifan bolted to ysr handle bars. If you do go for the 150 do go for the overhead cam version. I understand what Shawn was saying before, plus my RPM's are limited to 10K and I get some vibration @ 8K + rpm

The sprocket combo I was using to hit 90 was a 17T front and a 26T rear... Its hard to get it started in first gear though and you must shift @ 8k or more when over 55 MPH or you wont get past the peak torque range. The clutch slips when geared that high @ 9K rpm and above for a total loss of about 500 RPM X 1000 over (so 500 RPM loss @ 9000 and 1000 RPM loss @ 10,000... Might as well leave it at 9K rpm because thats top speed the clutch can handle... Fun times though, make sure you can hide behind that little fairing.

After all this it was not as scary as I was expecting. I thought it would seem much faster but the bike responded as well as my old FZR did @ high speeds. Not bad IMO



As for the 2 stroke I am going to try and find a 250F engine so I can have water cooling and 100 MPH capable riding. Plus it probably has a better clutch system.

Nooblette

I have a trail 70 It was my first bike ever. I kept everything in boxes after I disassembled it. One day she will go back together and be on the road again!!! I miss it so much. after 13,000 miles registered on the speedometer it took a dump. I didn't know anything about engines and most likely my points got dirty... I stopped riding it after that and I could have fixed it in as little as 20 minutes if I knew what I was doing!!!

Nooblette

some new video of my ysr. ENJOY
http://www.youtube.com/v/R4oCc7vzxTg...</param><param