Tales from the Emporium

[NordieBoy]

Just finished stripping/cleaning/re-building the carb.
A little bit of white gunge from where the slide rubs against the plastic bits of the slide holder.
Everything else seemed fine.

Re-assembled with:
152 DJ main, needle 3rd from top, 15.2mm float height.

I'll just have to go for a sping through the Maungatapu to test it out...

[NordieBoy]

The Dovedale side of Jacobs Ladder is now completely sealed

[clint640]

Just finished stripping/cleaning/re-building the carb.
A little bit of white gunge from where the slide rubs against the plastic bits of the slide holder.
Everything else seemed fine.

I pulled the BST40 in the 640 down during the recent preventive maintenance session, there was a bit of gunge in there, not too bad considering the last time I pulled it out was to change the jets when I put the new can on at about 10 000 km. At 52 000 km the slide is getting a bit worn. I might order in a new one, & maybe a new needle & mainjet as they could be getting worn now too & they're not expensive.

I also took the plunge & drilled the vac ports in the slide out to 3mm, which seemed to give it a bit more 'BRAAP' but further testing is required.

Cheers
Clint

[cooneyr]

The Dovedale side of Jacobs Ladder is now completely sealed

Knew it. Probably wont be long and they will do the other side. Maybe next financial year. You don't seal half a hill and not the other when there is nothing accessing the road at the end of the new seal.

Cheers R

[cooneyr]

Been meaning to get somebody to check a hose routing for me. I had one hose I wasn't sure what to do with when I put the bike back together couple of weekends ago. One end had a hose clamp of sorts and the inside of the hose was clean, the other end of the hose had no clamps and was dusty inside. After scouring the manual I found a thing called the Air Vent Hose (see mid was down the attachment on the lhs). Found the spigot on the carb for it so stuck the hose on and ran it along the top of the air box as shown in the pic. From what I can figure this is a breather for the float bowl and it seems a little strange that there is no filtering on the hose.

Have I installed it right and is this something we should be trying to put a filter on?

Cheers R

[Crisis management]

Don't you love american bikes?
My DR doesn't have that feature, only the cv vent, a fuel overflow and a fuel line but I recall my previous DR (ex america) had a plethora of lines and I had the same problem trying to work out where they went.
If I recall correctly, there were a couple of lines that came out of the carburetor in various places that then just joined each other forming a loop of vent tubes (there was a right angle connector at the junction point). I remember doing the WTF? as I tried to work it out but ended up just stuffing them all back together and putting it down to a branch of science I didn't understand.
So, I think those extra vents are interconnected rather than lying around with open ends, try that and see if it looks like it should work.

Good luck!

[NordieBoy]

Mine had the same air vent hose and yes it just goes back and sits on top of the air box.

They only sealed the Dovedale side 'cause that's they've just started logging and they can access it all from that side.

[NordieBoy]

I also took the plunge & drilled the vac ports in the slide out to 3mm, which seemed to give it a bit more 'BRAAP' but further testing is required.

That should make the response quite... crisp.
May be more prone to airbox pressurisation induced surging/bogging in gusty conditions though?

Or not...

[NordieBoy]

mx_rob has his dyno charts up on ThumperTalk now and his numbers are pretty close to mine.
His whole graph is moved about 200rpm to the right and I've got slightly more torque down low but the FCR gives it instant response without any lag at all.

Makes me happier about the BST though

[talbertnz]

mx_rob has his dyno charts up on ThumperTalk now and his numbers are pretty close to mine.
His whole graph is moved about 200rpm to the right and I've got slightly more torque down low but the FCR gives it instant response without any lag at all.

Makes me happier about the BST though

So you reckon that there's not much diff between bst and fcr with DJ thats cool! was trying to get hold of an fcr on tardme, first of all, hard to get and second, verry pricy upgrade, so not to sure now. what setup are you running at the moment? jets/exhaust/filter/airbox?
cheers.
how much-ish for dj kit?

[NordieBoy]

Big difference in feel.
The dyno operator apparantly thought the FCR was as close to fuel injection you were going to get with a carb.

Peak power and torque and the spread of power and torque are similar but little things like being able to ride a tooth higher on the front because it's so smooth.

If I could get an FCR39 off a YFZ450 quad (that's the one that suits the DR best) on EBay for $150us then I would probably do it.
Get it shipped to mx_rob and another $150us later you've got the best carb the DR can use.

The DynoJet kit was about $110 from a local shop.

152DJ main
DJ needle 3rd from top
Exhaust header weld ground out
Airbox top cut open
Carb spring shortened
2nd hole in carb slide
Stock exhaust with 4*11mm holes drilled in the end

Gives more power/torque with the SuperTrapp but too noisey...

[talbertnz]

Big difference in feel.
The dyno operator apparantly thought the FCR was as close to fuel injection you were going to get with a carb.

Peak power and torque and the spread of power and torque are similar but little things like being able to ride a tooth higher on the front because it's so smooth.

If I could get an FCR39 off a YFZ450 quad (that's the one that suits the DR best) on EBay for $150us then I would probably do it.
Get it shipped to mx_rob and another $150us later you've got the best carb the DR can use.

The DynoJet kit was about $110 from a local shop.

152DJ main
DJ needle 3rd from top
Exhaust header weld ground out
Airbox top cut open
Carb spring shortened
2nd hole in carb slide
Stock exhaust with 4*11mm holes drilled in the end

Gives more power/torque with the SuperTrapp but too noisey...

I see...
hmmm.. tempting tempting!
where did you drill the holes? "back plate" of exhaust? sounds like another good "free" mod if it improves power

[talbertnz]

Stock exhaust with 4*11mm holes drilled in the end

Ah any probs with WOF with that one?

[NordieBoy]

It doesn't look too modified standing behind the bike and the noise level is still low.

If I did it again I'd go to 8mm holes. I didn't see any difference from 8-11mm.



Looks like the hot pipe for the DR is the 97-02 GSXR1000 pipe.
More torque and power than the FMF Q2 and cheap off e-bay.

[GaZBur]

It doesn't look too modified standing behind the bike and the noise level is still low.

If I did it again I'd go to 8mm holes. I didn't see any difference from 8-11mm.

...

Hmmm! Thanks for the pic NordieBoy. I have opened up my airbox and gone to the middle dynojet but think your holes idea better than trying to get the CBR600 can i have welded up. I shall get the drill out on Saturday.