• jaguar's Avatar
    13 Hours Ago
    Fabian you have to understand that one of the motos of motocross racers is that "If you never fall you aren't going fast enough". We are the risk takers, lovers of danger and the adrenaline rush it gives. If it isn't scary it's boring.
    65 replies | 9797 view(s)
  • jaguar's Avatar
    22 Hours Ago
    congrats butre on the excellent top speed! I too used to race motocross (in Austin and in Paraguay) so we have the same kind of mentality. I don't care if the bike looks ratty, just if it runs strong and is reliable. I was hitting 43mph which felt scary fast without full race gear on, just...
    65 replies | 9797 view(s)
  • jaguar's Avatar
    23 Hours Ago
    I have tried to plot a timing curve that way and its impossible to be accurate. What results is sloppy, like shooting rabbits with a shotgun instead of a rifle. With my bench tester I can set the RPM and take my sweet time pinpointing exactly what the ignition timing is. Try holding an engine...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Day Ago
    yes it's true that if the gas dripped onto the header that would be enough to light it. But if it lit by contact with the head that means the head was at least 495 degrees which is too hot for an aluminum head. It can crack and warp at that temp. yes the CDI's could be somewhat tested on an engine...
    15 replies | 1255 view(s)
  • jaguar's Avatar
    1 Day Ago
    el, my CDI is the first one offered as a replacement to the stock CDI. Yes the basic design was copied from a Kawasaki but I changed some of the parts to match the needs of this engine. All other CDI's that followed are copies of mine, including yours. I lived where it rained a lot and moisture in...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Day Ago
    el, an engine has to be hotter than is a normal maximum to ignite fuel that leaks onto it. both advanced ignition and high compression contribute to excessive engine temperatures. The Jaguar CDI retards the ignition back to where it should be to not contribute to excessive engine temps. Yes it...
    15 replies | 1255 view(s)
  • jaguar's Avatar
    2 Days Ago
    when one door closes look for an open door
    7 replies | 193 view(s)
  • jaguar's Avatar
    4 Days Ago
    click on my signature link to see all the mods I recommend.
    13 replies | 545 view(s)
  • jaguar's Avatar
    5 Days Ago
    Jaguar CDI distributors: JNMotors Sick Bike Parts
    13 replies | 545 view(s)
  • jaguar's Avatar
    5 Days Ago
    10-4 Fabian. Vibration makes an engine very unreliable. JNMotors has the CDI in stock. I think the best wirst pin option is to buy the drill bit I list on my site and have your local machine shop drill out your wrist pin. That's what I did. I've never had the titanium pin.
    52 replies | 936 view(s)
  • jaguar's Avatar
    6 Days Ago
    carbonraptor charges $38 to coat a new titanium wrist pin. And it has to be new.
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    BB, so then you are all in favor of every street inside a town to have speed bumps? going to the grocery store and back you'd have to negociate hundeds of bumps. great solution! (not) all things in moderation. I have no objection to bumps in front of schools, nursery homes, hospitals, etc but...
    12 replies | 342 view(s)
  • jaguar's Avatar
    1 Week Ago
    you are right about timing being a critical factor in the combustion pressure that a wrist pin and its bearing have to tolerate. The degrees listed below the graph are the spark timings which match the graph by the color coding.
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    double whammy- overly advanced spark timing (near stock) and high compression
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    this research paper shows that increasing the compression ratio from 7:1 to 9:1 increases the combustion pressure 22%: http://rescomp.stanford.edu/~efroeh/papers/RDH_Engine_Performance.pdf
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    "I don't believe for a second that compression has an incredible difference on wrist pin life if the wrist pin is good quality." yeah but obviously the titanium pin is not as good as the steel pin which is why I just changed the recommendation on my page concerning it and high compression. It is...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    yeah but until I hear from people who have standard compression and don't get rain splashed by cars I won't believe that titanium is never a good choice. It's probably just not a good choice for the high stress situation of high compression. Going up from the standard 90 psi to 165 psi creates a...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    jaguar replied to a thread [Engine Trouble] horrible knocking sound in 2-Stroke Motorized Bicycle Engines
    my god man, take it apart and see what is wrong. possibilities: 1) you have too high compression and too lean a jet and you are causing pre-ignition 2) the top connecting rod bearing has gone bad 3) you have a new high compression head and the piston starts hitting it after it and the rod...
    11 replies | 296 view(s)
  • jaguar's Avatar
    1 Week Ago
    butre, 10:1 is very high, way too high for these engines. a '98 KDX200 has a 9.4:1 ratio and its cranking pressure is 155 so yours would of been around 165 if the rings were sealing good. I recommend never going above 135psi. and it is unknown if muddy rain water was splashed onto your air...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    here is a quote from https://www.highpowermedia.com/blog/3342/piston-pins-material-choices "Steel is not the only choice for piston pins though; a number of companies offer titanium pins. Titanium has a much lower density than that of steel, although its elastic modulus (a measure of stiffness)...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    butre, two questions: 1) how many miles before the engine started making noises due to wear on the titanium wrist pin? 2) were you using a high compression head and if so which one and do you know the cranking pressure? I have emailed Trick Titanium for a cost on a wrist pin. This is from...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    looks like you've got a motocross silencer on. I'll bet its loud. convert it to having a belly stinger for an 80% reduction in noise.
    4 replies | 174 view(s)
  • jaguar's Avatar
    1 Week Ago
    this place can make a quality wrist pin from titanium but at the high price of $150: http://www.paeco.com/Titanium%20Products.htm Best to try the Jaguar CDI and then balance the crank if that doesn't suit you enough.
    52 replies | 936 view(s)
  • MotorBicycleRacing's Avatar
    1 Week Ago
    Really? here are 2 miraculous pics of failed titanium wrist pins. I have more pics as I know of at least 4 failures like these. Titanium may be strong but the titanium wrist pins sold by juice are obviously not very hard and wear badly. the steel wrist pins are very hard and do not wear out.
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    no spinning other than normal engine use. the right size balance hole can be calculated. I think its around 12mm for the 66cc but its been awhile since I read my own info on it.
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    congratulations on your new bike. anything with two wheels is good but anything fast is great!
    4 replies | 146 view(s)
  • jaguar's Avatar
    1 Week Ago
    cheap electric bikes are terrible. Any 26" mountain bike that doesn't have a rear shock absorber will work with these engines. But you have to upgrade them a bit to make them reliable which brings the price up.
    11 replies | 328 view(s)
  • jaguar's Avatar
    1 Week Ago
    MBR, can you please explain how you think titanium, which is stronger than steel, will wear out faster than a standard steel wrist pin? No one has complained of such a miraculous event. If it still vibrates too much then you can buy a Jaguar CDI and if its still too much then take the crank out...
    52 replies | 936 view(s)
  • jaguar's Avatar
    1 Week Ago
    jaguar replied to a thread Zen builder in Introduce Yourself
    I used to live in Asheville, NC. check out my pages by clicking on my signature link. Zen: being natural and keeping life simple
    2 replies | 131 view(s)
  • MotorBicycleRacing's Avatar
    1 Week Ago
    http://www.damgood.com/cycle.html made a dual mount hub for Pipelyne a long time ago.
    89 replies | 7087 view(s)
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5 Visitor Messages

  1. View Conversation
    Can't you STFU and take a compliment?! You've been on call nearly 24/7. It's appreciated man.... even though you made me order the WRONG TIRES! :P
  2. Ok Cali, I appreciate you mailing me. No, All I know is that everything that Jag has told me about before JN ever started, has been a +. It will just be interesting to see how the new CDI does compared?!~

    Stay intouch!~
  3. View Conversation
    Best motored bike advisor of all time!
  4. Sounds good! Let me know what ya think?
  5. Nice..............Listen, have you used, or using the new CDI from KNmotors. If you are can you tell me what you think compared to stock CDI?

    Thanks, Glen
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About Cali-Rider

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Age
26
About Cali-Rider
Engine Type:
Motovelo P.O.S. + P&P, Exp. Chamber, Jaguar CDI, Delorto Carb, Shift Kit, and a ton of hours.
Location:
South Bay Area, CA
Interests:
Cars, Bikes, Guitar, and The Great Outdoors
Occupation:
Auto Technician

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________________________________________
MTB+66cc+Too many modifications to list=FUN!!
^^R.I.P. Above Motor^^ Does anyone ship motors to CA? PM me please!

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