The Cherry Fizzer

Discussion in 'Yamaha 250cc In-Line 4's' started by Revolver, Sep 2, 2013.

  1. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    You'll have to hear my pipe, my lord its loud! Definitely not subtle :cool:
     
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  2. Revolver

    Revolver Big Member Premium Member

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    I think that's not too far off the mark, since the EXUP valve is virtually closed. I've found anything below a 4k takeoff is a bit sluggish, and need a second bite of the clutch to bring the revs up and go again.

    But may just be my bike.
     
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  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Sounds like its FZRs in general .... as Ive always been led to believe all engines are built to run at "high" revs for power and efficiency then a bike with a peak of 18000 isnt going to perform that well at the low end of the range.
    I too have found the need for that second or even third clutch bite ..... maybe if I lost 20kg that may help.
     
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  4. Revolver

    Revolver Big Member Premium Member

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    I don't think the situation is quite that drastic. I'm a lightweight. 70 kgs!!
     
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  5. risky

    risky risky

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    if grey lost 20kg,s he would still be above that.lol.
     
  6. kiffsta

    kiffsta Senior Member

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    Hey risky, I'm 100kg plus , just remember every team needs a front rower


    Sent from my iPhone using Tapatalk
     
  7. risky

    risky risky

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    here is a question? has anyone tried a non exup aftermarket exhaust on their 2kr or 3ln?
     
  8. Revolver

    Revolver Big Member Premium Member

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    So you mean from the headers to the muffler join?

    Not that I know of.

    That one I sent didn't work?
     
  9. risky

    risky risky

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    am just curious as i have an aftermarket system here that is without an exup. i read the exup is to give lowdown torque.am trying to find out if the exup makes a difference. your exup works.if the exup makes little difference why did yamaha put it on their bikes then stop using it? marketting? power? torque?

    the aftermarket system without exup are all one piece painted black.
     
    Last edited by a moderator: Mar 28, 2014
  10. Revolver

    Revolver Big Member Premium Member

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    I think it would be a lengthy and in the end, nullified debate.

    My summation would be at the time it worked and worked well. As that was the cutting edge of engine tuning in the late 80's especially on bikes. As we started to get to mid 90's and early 2000's technology for tuning, intake exhaust have left the 80's for dead. Especially in the way fuel Injection and tuning via ECU boxes that can change tunes on the fly, learn how you ride and adjust power delivery accordingly.

    Look at the early turbos of F1. For the first 3 years or so the only turbo car detonated it's engine almost every race. Finally after sorting it out, one performance made every team sit up and take notice. 3 years later almost very team had gone turbo. Then they were outlawed. Now we are back on them again.

    In say all of this though, I'm only a youngen and a product of the 80's myself.
     
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  11. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    I thought I read the exup was to help clean up the rev range because of the RPM going to 18,000 and mainly to prevent a flat spot mid range.
    There are other makes using similar things but cant remember offhand who or what they are.

    People wire open the exup valve when they dont know or dont bother fixing it and setting it correctly ...Ive no idea how a bike runs with that done, but as I always say the Japanese engineers of the day Im sure knew wat they were doing.
     
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  12. Revolver

    Revolver Big Member Premium Member

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    Now if only they could make my iPhone stop making terrible post miss spellings and punctuation such as that I'd be very happy!

    Sent from my iPhone using Tapatalk
     
  13. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Dont worry mate usually I spend half my time on the forum editing u gen y tapatalk nancys :oops:

    :D
     
  14. Revolver

    Revolver Big Member Premium Member

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    I might be be gen y but I'm no tapatalk nancy. I use full site!

    That's why you will never see:

    "Sent via my iPhone via Tapatalk"

    On my posts!
     
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  15. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    what?
     
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  16. Revolver

    Revolver Big Member Premium Member

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    Lol.

    Genuine EL-OH-EL. Oh my stomach hurts now. Oh jeez.

    Me and my big mouth...

    I'll get an admin to fix that, errrr, wait, hang on......

    And you wonder why you have problems with your carbs? Tsk tsk. It's the big ring of practical joke karma my friend!

    Made my day.

    Bahahaha.

    First vote for best forum joke of the year right here.
     
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  17. Tim_

    Tim_ resident nutcase Contributing Member Dirty Wheel Club

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    I'm with you on this one. I don't use that tap talk stuff. I never liked it. Full site works better for me I reckon anyhow.
     
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  18. Revolver

    Revolver Big Member Premium Member

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    Well a little update.

    Had a regular come in who used to work at the bike shop that went busy when I had the 2kr. Been talking to him for a few weeks telling him about the bike, but hadn't ridden it due the weather lately.

    As he walked in on my break he took a quick flick of the throttle and came up to me said "you got some play in the throttle." I said "Yeah, not sure on how to get rid of it"

    Walked out to the bike and he had a quick play with the adjuster and tuned it out.

    I took it a little further so that the throttle is nice and crisp. Now I can actually blip the throttle on the down changes. Which is good, elimantes the possibility of a compression lock.

    I also had an electrical fault that was itermitant. Turns out the clip for the power cable to he ignition had come loose. Trimmed the wire, cleaned it up and refitted the clip and all is well again.

    I did notice today that there is a bit of oil leaking from the fork on the right hand side.

    Only other two things bothering me is I got wet coming home the other day during a shower and it took 3 days for my jacket and gloves to dry, and I may also grab a spare set of my shooting earplugs to wear while I'm riding. The wind noise as I'm riding, jeez, my ears are ringing when I get off the bike.

    Other than that she needs a damn good wash!
     
  19. Revolver

    Revolver Big Member Premium Member

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    Well it's time to update this thing. This is about the third time I have started a catch up post.

    So I have been enjoying the bike quite a lot. Taking it everywhere when the weather allows.

    Over Easter I had my battery drop a cell, so a new one was in order. But with 20% off at Supercheap it softened the blow.

    A few weeks later I was riding home and was giving it a bit then all of a sudden it started coughing and running rough. And the rest of the way was really playing up. Thinking it may have been the atmospheric conditions (getting cold) I took it for a ride the next day with the same result and then thought it was the carbies.

    After some advice for the local Yammy shop for the service bloke that has been working on them since the dinosaurs were roaming, he said remove the fuel pump because it may be overloading the needle and seats. Ok, so I did. I then pumped out the fuel into the drum, took it out cleaned the lines, then put the SAME fuel back in. No dice.

    Few days later I was at my mates place. While at my mates, I explained the issue. At which point him and his brother together said "bad fuel".

    I'm like "nah, can't be". I was then told to drain the fuel out. Tank, lines float bowls and refill.

    So I did. Fired first time, took it for a burn up the street, went like a goddamn rocket. AAARRGGGH! Took it for a test ride went faultlessly.

    No issues there for awhile. Then last weekend, I went to check the tyre pressures at work. And when I removed the hose noticed that the valve stem was bent a little and hissing. Straightened it back up it stopped. Bent it a little, it hissed. Then straightened it back up and left it and rode gingerly home. Next day ripped the back wheel off, and $13 later new valve stem. Got it home, degreased the swingarm and rear wheel had it looking like this:

    [​IMG]

    Then on Mondays public holiday I took the bike up the road to check out a few properties for a possible business venture. I took the bike down a goat track, and as I went to turn with the tract, there was a big wallow covered by a lot of sand.

    At that point, my shoulder got shoved back and the bars turned hard right, bike lent right and lent right, and then past the point of no return, and I layed the bike down as gently as I could. But still cracked the indicator and bent the mounting bracket. Bugger.

    At which point I turned bike off, shoved bike into the sand pressing hard on the tyres, and lifted. Surveyed the damage.

    A broken indicator lense and bent the bracket, dirty fairing:

    [​IMG]

    I got off pretty lucky since I was able to lay it down an not drop it, and it was only at about 5k an hour. However after I picked up the lense and bulb, at home I re-pressed the globe holder together, superglued the lense back back on and it's lasted since. I'll be changing it out for my spare indicator when I have a few days off next week.

    Yesterday I went to start the bike in the coldest morning we had so far. And no dice. Even with a push from a customer it refused to start. Left the bike out in the sun for 20 mins. The attempted two roll starts then stop at the magical place on the forecourt of work where the bike will start, two hits of the button and she coughed into life. It's getting harder to start on cold weather and using the choke or throttle to speed up the process results in flooding.

    I know that this is problem that needs to be fixed but in warmer weather / late morning / afternoon or at night/5am in the garage. It will fire first time without fail.

    Not even a roll start will do it. Runs for a second then Fizzers out (haha geddit?) but will eventually start on a particular place on the forecourt at work every time. It's a mystery.

    However, there is an electrical fault with the bike, the indicator flashes REAL fast, so fast it looks like it's stuck on, then slow down to just plain fast. Not sure if the throttle has an effect on this yet.

    It did blow the flasher relay but have replaced it with my 2KR one. Still behaves the same..... Hmmmmm....
     
  20. Revolver

    Revolver Big Member Premium Member

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    This goddam bike does not like anything below 15deg weather to start in.

    I've Spent the last 2hrs on and off trying to start it. Roll starting and have completely drained the battery in pure desperation, frustration and anger trying to get the bitch to start. So I've called RACQ for a tow.

    I'm tired both from the day and physically simply from the amount of pushing in attempt to get to start. I just want to go home to sleep.

    There is NO reason why it shouldn't start and it goddamn knows it!

    F#%^ this F#%^ing bike.
     

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