Pumba the XJ750 project

After 2 far rides (1,000klm in 24 hours) Pumba ended up at a Bikini wash in aid of the state spinal research unit (MAD or Make A Difference).





Awesome day and the girls had fun. Pumba was probably the oldest bike there.

Thinking about it, this would have been Pumbas first encounter with a female.

 

At the end of the month Pumba will have a rest from the road, and get new paint and the new engine fitted.

Proof of progress! (and new camera)

 

Nice! Good job on the paint, and the pics are excellent.

 

Nice hanging and priming (I guess). What color are you going for?

 

Finally had a chance to run up the old engine so I have a base to compare the 820 engine and the following mods.



Bog standard XJ750, Mac 4 into 1 exhaust, fresh plugs, clean air filter. (engine tired and uses oil)

 

not too bad for a tired engine bloke ?

what are you aiming for with the big bore kit?

How will the bottom end react to more power?

are you doing anything to the bottom end to beef it up?

Cheers

OZ

 

Bottom end should be fine, as it is pretty much the same as a 900 to start with. And power probably wont exceed 20% over stock. I do however expect more midrange and less fuel usage.

 

Current things happening:

A half done paint job (only the base color so far)

 

I am more than happy with the base color, fingers crossed the second contrasting color looks as good.




And roo spotters:


By the end of winter we should be looking great!

 

Which paint did you use on the hanging engine above?

 

VHT engine enamel.

 

My kids love this bike solely on the fact you used those happy face dudes for light covers . Looks great!

 

Ditto.. really like th colour and your lights. You mentioned somewhere about going for a long ride later ( not just a farride )..any plans for some type of fairing or not going to bother?

 

Looking damn sexy!
Very nice that shade of green, to be sure.

 

Never thought about it, I wonder if it has been done before?

It would be cool to be the very first to use 'awesomeface' as a light cover.

 

I have been looking at the flyscreens that are an off the shelf fit to the dominator lights, and my try one.

The best thing about custom bikes is the ability to reverse direction if needed when coming forward.

 

.

I should have guessed it was called awesomeface... All you need is a bit of BBQ paint for your headers and you'll be all set!

Marcel

 

Its been 2 months without an update, so I am hoping for a decent update for Pumbas 3rd birthday in 2 weeks (3 years as a project, 2 on the road).

Until then, a winter in Perth pic:

 

You two make a fine pic ..really like what you've done and the attention to detail, great colour and in 2 weeks new shocks ..you'll like 'em .. and 1 more .. th 'yam yics' personally i reckon it detracts from th look, i got plain 650 covers but that's me, congrats to ya.

 

Sorry if I've missed it but curious about your light set up have you upgraded the charging system or are you running LEDS?
Be able to see real well with those lights I imagine,even blind skippy's still hop straight towards you though I bet.

 

Police alternator has almost 10 amps more. (allegedly) Should be fitted as soon as I can.

 

Darkfibre, I see that you don't have your efi on the bike. How is the project progressing? I'm doing research on efi for my fj900 engine buildup. My plan is race cam, valves, springs. Ported & polished. Increasing it to 1000cc, & efi. How far out are you from installation?

 

EFI is for the new engine that is way overdue to be finished, I have to have the new engine finished and run in before the next farride (October).

It probably wont be finished until Christmas, but it may get a bench run on the old engine.

Winter + new job + study seems to mean I get nothing achieved.

On the bright side, I have the fuel pump and wideband sensor, so i'm not waiting for parts.

 

I decided to go for the efi. I've seen the GSXR600 throttle body being used a few times. They seem to fit into the rubber intake runners? There also is a few microsquirt harness kits on ebay that i saw. I was wondering if you could give a list of parts for a install? Is it important to get the wiring harness for the GSXR 600? I have a somewhat idea for the parts and you seem to have a good insight on this and I just wanted to hear your imput? Also, if you had any recommendations on anything else like a different throttle body, etc? I'm going to be using it on a XJ900 engine.

 

I want to spend a bit of time to cover this in detail, I will reply soon.

 

Preempting next week.

Almost there.
An XJ engine fully rebuilt and to factory clearances, and a few improvements.


Intentional posing of components.

 

Hi, a quick question. I see you removed the mufflers on your bike. I too have just down pipes.. Did you put baffles in the pipe to keep back pressure. I am not able to speed up over 50mph. Do you think the exhaust is my issue? Cheers.

 

It only looks like the muffler is missing, but its on the other side

Mac 4 into 1 exhaust, lost the paint on the headers in only 2 years

 

I can hear Pumba growling all the way over here. It wants that big bore engine now

Ghost

 

damn that engine paint looks sharp!!!

any plans to paint the yics lettering/stripes on the valve cover black?

 

This engine purrs already!

 

WOW. absolutely gorgeous paint job

love all the new hardware, sucks you couldnt find new acorn nut thingers.

What paint did you use?

haha ps - love the cat, such a fan, awww! haha

 

The acorn nuts are stainless and will polish up nicely. If you have a buffer (looks like a bench grinder) they will look like chrome.

 

I'd absolutely love it if you could give a short step-by-step for doing the timing...

 

The Pumba projects third birthday!

 

Oil and running in is serious business, this is a third of third of the original purchase price in the picture.



80klms down:

 

Congratulations! What are the plans with dyno & efi, soon?

 

How does the lift bracket connect to the motor? Its just what I need to pull my engine so I can clean her up! Could you post a few pics of it?

 

Current plans are to clock up at least 1,200 klm in the next 6 weeks, then do a farride on October 20 (that will total 1,600klms plus for the weekend).

After that will be a dyno run to see the numbers before the EFI goes on.

During that time I intend to get the EFI running and the basic settings done on the old engine that was just removed.

Now its spring we should have plenty of updates coming.

 

Bracket lifts by bolting onto the M8 head to barrel studs. It was a quick throw together made out of some old shelf brackets I had made, it certainly could be improved upon.




Welds are a bit rough as I only have a $45 stick welder.

 

No, thats great darkfibre! I need to make one. Thanks for the pic's and dimensions. looks like a little project to do when it's raining.

 

Great engine bracket, thanks for the measurments. You are going to beat me done. It is coming into fall here, so might be awhile on my project. What does tube measure? Can't wait to see your dyno numbers.

 

Tube is 40mm.

 

Yesterday was a sunny spring day, so I managed to get 300ks onto the new engine in the afternoon.

I like this shot, bugs on the lights and a horizon reflection on the tank.

 

Nice Bike! Nice work! I tell ya if the wife and I ever make it to visit her family, uncle and cousins, in Australia I'll make sure we get a flight over to Perth! Her uncles in Melbourne, I know thats on the East coast and your on the West coast.

 

That is one very good looking ride!

 

I just bought the microsquirt V3 & a '03 GSXR 600 throttle body w/ a 420a coil. Should all come in the mail in a week or so.

What is the pilot hole diameter on the Trigger wheel? I found a site that sells them in the UK. There is a 3" trigger with a 5mm pilot hole. Do I need to bore a larger whole? I'm wondering if there is a USA site that sells them? Did you have to mod anything else to mount the trigger wheel?

 

Beautiful bike! I was reading this thread and couldn't put it down!

 

From memory the centre hole was a fraction under 25mm. I chose that size after working out how much I could machine the original factory trigger wheel and get the spacing that I wanted so I could keep the factory sensors unmodified.