Project Grasshoppers FZR 3LN3

what happened to "all gear all the time"?

 

Sammy is now registered. I think the bike is slightly flooding sometimes, but I know now how to recover from it, so see how it goes on the trip to Sydney tomorrow,,, yeee ha.. And by the way, got fully comp insurance from NRMA for $30 per month insured for $3500.

 

So... I have been riding Grasshopper's FZR around this week, and I can tell you, it goes like a scalded cat!

However it has some issues, namely it's using a lot of fuel. 100-110KM to reserve (FZR250 forum states it should get 150-200 before reserve), stinks of fuel once warmed up and stopped at traffic lights. Fuel tap needs doing (have ordered the litetek bits).

Front suspension leaves much to be desired. Needs new springs I'd say. They already put thicker oil in it

It has trouble in cold weather. It will flood if you don't give it enough stick and cut out if not warmed up. Choke not reliable

Clutch needs to be adjust, it grabs right at the end when you let it go. Both the clutch & brake perch need to be adjusted as your hands will had the fairings at full turning

Noisy cam chain, a bit rattly.

The previous owner has redone the jetting and I suspect is the cause of the fuel consumption and flooding issues.

Speedo does this weird clicking thing at low speed, and jumps up and down


That's enough negativity though. It does go like stink and handles like it's on rails. It will shoot flames out the exhaust if you back off the high end of the rev range in 1st. You can also get a nice exhaust pop, but it's not easy to do.



Nice pop at 26 seconds. Need to find a better microphone solution, because it sounds like a small fart (in reality it was MUCH louder)

 

I get 180-190 to reserve.

Yep sounds like mine

Sounds exactly like mine before the rebuild. However, even after the rebuild, I have this wierd issue of cold, idle too low > can flood. Warmed up, (Idle not touched) Idles very high (over 3 k) So turn idle back down a tad, has problems staying alive when cold starting.

Yep sounds like mine.

Yeah Ive found that rebuilt carbs will do that. Most of the time, Im not even getting to full throttle before I have to change gear again! Im still winding it on!

 

We had a similar thing, cold starting & idling problems, I leaned her up on the needle to second clip from the top & 1.5 on the screws & much better, Grasshoppers jetting sounds like it could be causing issues if theyre too rich, probably great at high revs but shitty in traffic ?

 

What settings do you have on your pilot screws @Willrcr15?

 

Once warmed up it's fine, but still a bit boggy below 10k RPM. Basically you have to keep it at 10k rpm as you let out the clutch or it will flood.

I flooded it twice in tuesday, figured out how to recover fairly quickly. Full throttle and back off slowly until it picks up.

When cold, the choke doesn't seem stable. It fluctuates up and down. I just keep the revs up manually otherwise it will die. It's so quiet in the traffic I have to check if it stalled or not.

 

Yeah, that's pretty much right... I think leaning up on the needle is probably the way to go..

 

Today I hit reserve at 80KM. Luckily was in the lane cove tunnel right near the breakdown bit at the side, flicked the tap over and was on my way.

Filling up every second day. 10 litres today (total ~100KM) 1 litre = 10KM - Horribly economy!

 

one & a half turns out

 

Sounds ugly, if the jets have been changed for bigger ones then they need to be replaced with standards & get it back to basics.
There is enough room on the main needle to ghet the fuel up if needed if there's a change in exhaust flow & that's about all you need, the exup valve helps enough at lower revs till it's open.
How is the exup valve ??
Is it running the air box ?

 

Exup works fine, it just floods cause it's too rich, and leaks at the fuel tap (wet/moist with fuel). Reeks of fuel once you slow down. No visible drops on the ground

 

Sure there isnt a leak?

 

That's what I'm thinking, simply not enough k's to go through that amount of fuel ?????

 

If there is, it's evaporating before I can find it. You can smell the fuel but there's no liquid running down anywhere. The fuel tap is always a bit damp even in the off position. If there is another leak separate of the fuel tap, it must be getting evaporated by engine heat.

Just checked the tyre pressures - within spec.

Adjusted the clutch so it has some free play. It was rock hard with no play before, very grabby. Hope that will improve shifting.

Tested front suspension. Spongecake. Can almost completely bottom out the forks just with the front brake & rocking up/down. Noticeable CLACK & left/right steer when going over speedbumps at a decent velocity

Rear suspension: Squeakier than GreyImport's bed while he's overseas. A bit soft, too

All said and done, it does go, and it rides well... just the jets/needles that's the issue. The fuel tap will be solved once the litetek kits I ordered get here. Carb kit for mine once they're available.

I'll let the CEO & Co-CEO of the fizzer factory have their fun with everything else. Signed, senior road-test engineer

 

I was getting fuel evaporation from parking my bike in the sun at work, same problem for other colleagues, lost at least 30km in range, also I found my zeal goes better on 91 than 98 octane. Also I run my tyres (bt45) at 34 psi. Don't know if that helps

 

At the moment it only sits outside during the night. During the day it's underground secure parking @ work.

I went for a little spin this evening, hopped off the bike, turned the iphone torch on and had a peek. I think I've found our leak! Thankfully the fairings are off already



Like that on both sides.