Lunchbox and Jetting, Quick questions!

[Jayke]

When I bought it. The guy said that he loved and cherished this bike, that he had always looked after it and serviced it.... Uhhhh. No.

Surprises me too, Ive never seen a sprocket that bad before!

She's my baby now, she will be pampered and perfect!!! Lol!

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[BockinBboy]

Yeah, that's pretty bad.  Sprocket that bad = guaranteed trouble.  That fluctuating you were having... was that just while the bike was still, or were you moving?  If you were getting some inconsistent pulling or dragging that doesn't register on rpms... its probably that sprocket/chain.  You are replacing both sprockets and chain, right? Those should all be replaced at the same time anyway... but if the rear sprocket is that bad, the front sprocket and chain are in the same boat.



- Bboy

Edit: Oh, and the noise you hear? You think its an effect from that chain/sprocket you had going on there? 

[Jayke]

Yes I've bought both front and rear sprockets too. DID set. Having trouble though as I can't get the wheel to go far enough forward. The brake is stopping it as it has a brace holding it in place. Any ideas?

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[Crasm]

Have you tryed loosening the brake talk arm bolt to allow for any extra movement??

[gsJack]

With bolts loosened on both ends of the brake brace and the adjuster screws backed off and the axle nut loose it should move forward.  But it's still not always easy so grab the passenger grab handle with both hands and kick the tire hard and it will go forward.  Hold on tight so you don't kick the bike forward off the center stand.   

[The Buddha]

Im playing with getting a 22.5 pilot so i can wind the mixture screw in a bit to allow for further fine tuning but we shall see im happy with it 4 turns out but just want to play a little lol

Pilots affect idle, yes, but so do mix screws, and you can easily cover the pilot's range with air screw there. But pilot also covers 0-1/8th throttle. That part you can not compensate with air screw.
So if you have a nice idle but are falling on your face @ gentle take off that = pilot is too big.
Especially If you're taking off revved up and fast like a Formula 1 full throttle start just fine - definitely pilots.

Cool.
Buddha.

[Jayke]

I managed to do it, thanks for the advice guys. Ended up taking the bolt out for the brace, it then went just fine, getting the brace bolt back in was a little hard but is all good!

What can I say? Other than it looking great compared to the old, my what a difference! I must of been losing power or something because they were so bad I guess.

It feels alot more fluid, changing gears feels great now opposed to the sloppy previous. The cover for the front sprocket and underneath the front sprocket..... just wow.... there was at LEAST an inch thick of gunk in there - it was really really nasty.

Pics Incoming!

New vs Old Rear Sprocket

IMG_3472 by itsJayke, on Flickr

Old Rear Sprocket Close-Up of Teeth

IMG_3470 by itsJayke, on Flickr

Old Front Sprocket

IMG_3465 by itsJayke, on Flickr

Sprocket Cover

IMG_3463 by itsJayke, on Flickr

Inside View.... Ouch!

IMG_3462 by itsJayke, on Flickr

So yeah, bike feels really fresh now and feels like it has more pull, happy days! Just gotta tune up that carb and do some cosmetic changes!

Btw, the new chain and sprockets are REALLY quiet, the old oned made a ton of noise lol!

Sorry if the pics are unwanted, just like to share!

[BockinBboy]

Pics are always welcome! ::

- Bboy

[Janx101]

holy snappin duck crap Jayke!! .... Even the worst untended and abused dirtbike sprocket I ever had wasn't like that rear!!! .... Not hackin on you of course?.. But shame on the previous owner for letting them get even close to that bad! .... 

[Jayke]

I know right? This is him loving and cherishing his bike too. He said "if you treat your bike well, it'll treat you well too" lol...oh please!

Bit by bit though at least doing everything on this bike, I now know everything is done properly or even done at all.

He said he did a full rebuild and restore. I wish I knew what that actually covered lol! :p

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[radodrill]

I had a bicycle that I used as a daily commuter in town for 4 yrs (well over 1000 mi/yr) without a chain/sprocket change; the rear was noticeably worn, but a far cry from the way that one's worn.  On the newer bicycle I then replaced the chain about every year before the stretch got to the point of starting to wear the teeth.

On the plus side; you'll know how to do all the service/repairs yourself

[Jayke]

I guess it's pretty bad then :p I've only ever replaced like 4 sprockets in my biking time, rears that is.

And yes, one last thing to do now, the valves/tappets. Should of been first really but haven't had the time in one space to do it. Gonna try get it done tomorrow I think!!

It's good really, cause I'm learning and getting good results each time, I'm having a ton more fun doing it. Great fun! :p

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[The Buddha]

When I bought it. The guy said that he loved and cherished this bike, that he had always looked after it and serviced it.... Uhhhh. No.

Surprises me too, Ive never seen a sprocket that bad before!

She's my baby now, she will be pampered and perfect!!! Lol!

Sent from my C6903 using Tapatalk

You do know that usually that refers to cosmetics right ...
Mechanically sound is a lot different and it takes a different type of person ... like me. I dont even see mud on the side of my bike. If the chain looks a wee bit dry, it will be splattered with lube. That lube will then get splattered all over me, but I'll be smiling ...
That will bug a cosmetic guy so much he'd rather run the chain dry.

Cool.
Buddha.

[Jayke]

You do know that usually that refers to cosmetics right ...
Mechanically sound is a lot different and it takes a different type of person ... like me. I dont even see mud on the side of my bike. If the chain looks a wee bit dry, it will be splattered with lube. That lube will then get splattered all over me, but I'll be smiling ...
That will bug a cosmetic guy so much he'd rather run the chain dry.

Cool.
Buddha.

I guess you are very right with that one I didn't think of it that way, I like everything to be working perfectly, then looking the best it can after. Suppose he just liked polishing it lol!

Right, just been out for a big ride.
I think I know what I need to do, let me know your thoughts guys.

Overall the bike now has much better power from 6-9k rpm, but the punch from 4.5-6k rpm is much much greater than the higher end rpm.

There seems to be a little hesitation as if it's a little rich on pull off after being stood still aka at traffic lights so I assume my pilot is too big(?)

And to fix the top end, I guess I should try a 150/152.5 right?

Atm I'm at 20/62.5/147.5 and 3.5 turns.

Or would going down to 3 turns help a little with the very bottom range? As the idle seems a tad(barely noticeable) lumpy.

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[gsJack]

I've put 80-100k miles on 4 of the 6 bikes I've owned and have never seen a rear sprocket even close to that badly worn but you'll see a lot of chain lube on my rear wheel most all the time.  I have never replaced a rear sprocket on any bike but replace the front one every 2nd or 3rd chain.

[Jayke]

Jeez. Then again, this bike had like rusty ass spark plugs, almost no engine oil(of which was black and horrid.  Poor bike


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[radodrill]

Right, just been out for a big ride.
I think I know what I need to do, let me know your thoughts guys.

Overall the bike now has much better power from 6-9k rpm, but the punch from 4.5-6k rpm is much much greater than the higher end rpm.

The needles are a bit too high; lowering them will turn down the mid range compared to the top end.

There seems to be a little hesitation as if it's a little rich on pull off after being stood still aka at traffic lights so I assume my pilot is too big(?)

Hesitation is generally a lean mid-main; I'm experiencing the same with a 62.5 and about to put in a 65.

And to fix the top end, I guess I should try a 150/152.5 right?

If you're still running lean overall, then yes that would help the top end; but you still need to lower the needles as mentioned above.

Atm I'm at 20/62.5/147.5 and 3.5 turns.

Or would going down to 3 turns help a little with the very bottom range? As the idle seems a tad(barely noticeable) lumpy.

Lumpy/loopy idle indicates your pilot is a bit lean; you might even need a 22.5 pilot.

[Jayke]

Right right so if I lower the needle one more, it won't make the mid range worse will it? Just make the difference between the two less noticeable and more smooth right? I think I'm on the right track anyway.

My 65s still aren't here funnily enough. They were sent next day delivery on like Monday or Tuesday can't remember. Strange!

I will see how it is with the needle first, then if I still need to change the main jet, I will order the pilot and the mains together. To save ordering twice!

Thanks again!

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[radodrill]

Right right so if I lower the needle one more, it won't make the mid range worse will it? Just make the difference between the two less noticeable and more smooth right? I think I'm on the right track anyway.

Lowering the needles will somewhat reduce the mid-range pull, but also adjusts the transition to the top-end.  Since you notice a drop in pull going to the top end, this should smooth it out.  If you feel a sudden increase in pul going to the top end, then your needles are to low.  If necessary, you can use flat washers under the needles to get finer adjustment than with the e-clips alone.

My 65s still aren't here funnily enough. They were sent next day delivery on like Monday or Tuesday can't remember. Strange!

That sucks; hope you get them soon.  I just picked up some jets, spark plugs, oil, and filter from the dealer; in addition, new tires are on order

I will see how it is with the needle first, then if I still need to change the main jet, I will order the pilot and the mains together. To save ordering twice!

I picked up all main jet sizes from 150-160; so I'll be able to see what works best for me 

[Crasm]

And on my side of things , ive readjusted the mixture screws to 3 and a half turns out and further adjusted the idle so its idling at around 1500 nice and flat and everything is running great so i think thats as far as im going with it as the saying goes if it aint broke dont fix it.