Going to try the new Hummer G4

[jmfordxr8]

hi guys thanks for your help my carb is a 30mm keikhin the main was a 108 and the primary is a 36 i used a 1.5 jet drill on the main do you think this might be too big i had the needle set on the bottom grove i moved it to the center it did not seam to do much to fix it the air filter is sucking as i can hear it as whit the old air filter it had no hope i put the filter on first and it had big flat spots that is why i played with the jets now it is just doing my head in

[rodbox5]

I'd take Weedgee's advice on jetting.

I didn't realize he'd gone for a pod filter as well as the new muffler - but seeing that he has, the jet set-up he's used should be in the ball park for you.

I'm sure Weeg will give you a precise run down on his settings if you drop him a line.

Also the following link will allow you to download a tuning guide from Mikuni.

It's the VM series you want.

Mikuni American Corporation

This gives a pretty good account of how to get the best out of your set-up. Even if you have a different brand of carbie - the thory will still be applicable.

Although the hummer specs say that a 30mm Mikuni is used, it is actually the VM 26 which is most commonly used.

New jets for your carbie should be available at peanut rates.

Good luck with the project.

[Weegee]

Hey rod
Sorry i thought i had mentioned the pod filter? anyway i bought it off eBay and i liked this one becuase it has the nice tight foam inner but a cause removable out skin which i thought would be good for cleaning real quick. And where i ride there is no water for crossings more than ankle deep so i think it should be ok and hopefully add some more grunt. I still have to put the sprockets on too so maybe this weekend after the ride i will do that.

[rodbox5]

No worries Weeg,

Yeah - pod filters are easy to look after and maintain. Unfortunately where I ride, they would gunk up in two minutes flat.

I had to keep the air-box and mod it up to be bullet proof instead.

I have to say it worked well - and the bike has survived a couple of drownings! The only down side is that it's a real pain to dismantle and clean, but then it keeps me busy and away from the mowing on week-ends - Ha Ha!

[jmfordxr8]

hi guys thanks for your help i took the carb into the bike shop today and he is all over it the main jet that i had was to big that is why it did not rev up high so he is having a play with it for me

[motoXXX]

i am starting to get fiar impressed with the new 250cc atomik bike

the chinas ability to build quality bikes is on the up coming i think

check em out looks like a crf250r

NEW ATOMIK BLITZ 250CC PIT DIRT BIKE MOTOR THUMPSTAR - eBay Other Trail Bikes, Trail Bikes, Motorcycles, Cars, Bikes, Boats. (end time 29-May-08 20:00:00 AEST)

[stinky626]

seen thie blitz bike at atomik when i was picking up the missus thumpstar. its a big bike about the size of yzf450 just wondering if its strong? Up next the kudas and fury it was a monster i thought it had a 400 in it.

[rodbox5]

Hi Boys - just got back from a business trip to India and took a little time to visit the Royal Enfield factory whilst I was in Madras.

I work for a Perth engineering company - so there are a lot of bike enthusiasts around the place. I'm taking orders for the boys on my next trip and will ship some bikes over to Perth in a container. For three grand you can get a 350 or 500cc classic. which has only had disk brakes and electric start added since the 1960's. In black & chrome they look really shmik and apparently are really reliable old thumpers - check out the web site:

Welcome to Royal Enfield Motorcycles | Motorcycle India

Theres also a US and Brit site you can link to (see top RH corner of web page) and they show all kinds of different models made up for export.

[rodbox5]

Originally Posted by stinky626

seen thie blitz bike at atomik when i was picking up the missus thumpstar. its a big bike about the size of yzf450 just wondering if its strong? Up next the kudas and fury it was a monster i thought it had a 400 in it.

They look bigger because of the water cooling - where the radiators add quite a bit of bulk.

I don't know if I'm ready to accept a China with liquid cooling yet though!

Like you say, the Chinas are getting better all the time - but liquid cooling adds another layer of engineering complexity, together with higher design and materials technology requirements. Then there's always the problem of stacking your bike and putting a hole in the radiator - especially when you're stuck out in the bush miles from anywhere!

I've noticed that even David Knight (world enduro champ) has pulled out of events with buggered radiators - and he rides for KTM!

I think the current trend for water cooled dirt bikes may be a passing fad. The concept may hang on with motorcross bikes (where speed is everything and you've got a mechanic at the track) - but there are too many potential problems with it for bush bikes.

[rodbox5]

I've been having a look at the new Kuda Pro specs

Besides a change over to the Loncin OHC engine, extra bling and lighting kit, the drive has been updated to a heavier 520 gauge chain. Looking at the overall length, I think they've also increased the length of the swingarms, which will make the bike more managable up steep hills.

The ligting suite and instumentation looks pretty OK - so I'm wondering if there would be much to do to make this bikea registerable dual sport? I might write to Atomik and ask.

All in all it looks pretty good on paper - anyone who buys one please write in and let us know.