Supercharged CBR250 build

See cars and bikes being built for the salt

Moderator: DLRA

User avatar
gennyshovel
Posts: 833
Joined: Tue Mar 29, 2005 10:10 am
Location: Broken Hill

The easter bunny's been

Post by gennyshovel » Sun Apr 08, 2012 11:04 am

Laslo's oil leak solving ceramic hybrid bearings arrived last week, unfortunately, on of 'em appears to have been stored in a grain silo,,there's a replacement on it's way, & I plan on bench running the troublesome bearing in the drill press, just incase I have to use it
Image

I'm still not sure how many of the team will be available for the potential late May date ?

Image

Full steam ahead, hol's booked, adrenalin's building,,,

Image
Tiny DLRA# 484
Postiebike Racing , created & funded by TwoBob Engineering

User avatar
RGV
Posts: 688
Joined: Sun Feb 06, 2011 9:17 pm
Location: Adelaide Hills

Re: Supercharged CBR250 build

Post by RGV » Sun Apr 08, 2012 11:27 am

Looks great Tiny, hope the new seal works.

Image
Last edited by 1 on RGV, edited 0 times in total.

Last Minute Racing
DLRA #928

2010 MPS/G 250 118 MPH
2011 Washed Out
2012 Washed Out
2013 MPS/G 250 131 MPH (RECORD)
2014 MPS/G 250 140 MPH (RECORD)
2015 MPS/F 250 DNF
2016 MPS/F 250 114 MPH (RECORD)
2017 MPS/F 250 DNF

User avatar
JonB
Posts: 268
Joined: Wed Oct 06, 2010 6:35 pm
Location: Brisbane

Re: Supercharged CBR250 build

Post by JonB » Sun Apr 08, 2012 2:40 pm

I will be there without a bike if you want a hand in the pits Tiny, not real sharp but I can lift heavy stuff.

Jon
DLRA#1115
Underhouse Engineering

User avatar
gennyshovel
Posts: 833
Joined: Tue Mar 29, 2005 10:10 am
Location: Broken Hill

Re: Supercharged CBR250 build

Post by gennyshovel » Sun Apr 08, 2012 7:13 pm

JonB wrote:I will be there without a bike if you want a hand in the pits Tiny, not real sharp but I can lift heavy stuff.

Jon
Thanks Jon
RGV wrote:Looks great Tiny, hope the new seal works.

Image
The reason I used hybrid ceramic bearings RGV,is they don't need any lube, other than the lube they are assembled with, leak solved,,,,
Tiny DLRA# 484
Postiebike Racing , created & funded by TwoBob Engineering

User avatar
RGV
Posts: 688
Joined: Sun Feb 06, 2011 9:17 pm
Location: Adelaide Hills

Re: Supercharged CBR250 build

Post by RGV » Sun Apr 08, 2012 9:59 pm

Yep they look like a great idea, some pretty impressive vids on youtube. Ive heard a ceramic bearing is worth 250 watts so 4 bearings (wheel bearings in a bike) = 1 kw. But the top of the line are around $175 each.

Last Minute Racing
DLRA #928

2010 MPS/G 250 118 MPH
2011 Washed Out
2012 Washed Out
2013 MPS/G 250 131 MPH (RECORD)
2014 MPS/G 250 140 MPH (RECORD)
2015 MPS/F 250 DNF
2016 MPS/F 250 114 MPH (RECORD)
2017 MPS/F 250 DNF

User avatar
ROSS BROWN
Posts: 477
Joined: Thu Feb 18, 2010 6:43 pm
Location: COORPAROO BRISBANE

Re: Supercharged CBR250 build

Post by ROSS BROWN » Wed Apr 11, 2012 1:57 pm

Sounds like a little top fuel engine.. 8)
and now looks sharp as well .........
see ya at the lake...
Ross...
IT IS ALL A RACE AGAINST TIME.
TIME WAITS FOR NO ONE.

HOW FAST CAN YOU GO ?

S/UF 925

User avatar
gennyshovel
Posts: 833
Joined: Tue Mar 29, 2005 10:10 am
Location: Broken Hill

Re: Supercharged CBR250 build

Post by gennyshovel » Wed Apr 25, 2012 6:31 pm

All the past problems have been cured, but another has developed,,,IT HATES THE COLD !
1st off, it wouldn't start today,,the old battery voltage drop V's CDI struggle reared it's ugly head.
The battery is left over from the postie's last run in '10, so its gotta go, I've got a new one in stock, but don't want to fill it with acid just yet,,,,,
After putting the old one on charge while I went and perved on Frase' "new" 490 powered '38 Chev coupe (NICE !) and when I returned, I put a pocket full of left over Chev noise I stole from Frase, and Laslo loved that,,but run as rough as the Chev did, but for completely different reasons.
Because of my plenum / BOV design,,theres a nice little depression for any fuel that drops out of suspension to build up right at the bottom, and when it gets picked up by the passing good shit,,it tends to keep burning in the collector,,now, as nice as it looks, a blue / yellow flame leaping outa the exhaust at a high idle, it not a good thing.
I need to , yet again,,partially remove the blower to take the BOV plate of, and fit a bleed to it, AND, don't try and start it with a crook battery.
There goes yet another tentative test ride,,,,,,,
Tiny DLRA# 484
Postiebike Racing , created & funded by TwoBob Engineering

hawkwind
Posts: 294
Joined: Fri Dec 17, 2010 3:50 pm

Re: Supercharged CBR250 build

Post by hawkwind » Wed Apr 25, 2012 7:40 pm

its always something Tiny :( but you have it by the balls mate :) I enjoy your build diary's always interesting and entertaining. When you live up near the snow line and run alchy its always a hard start. Hope you get the chance to run it on the big white dyno soon :)
Vehicle......................A new creation.
Designed by................Troglodyte.
Engineered/ built by......Rustic.
Financed by.................Nickles & Dimes.
Rider......................... Tardus Vetus Inflatio

User avatar
gennyshovel
Posts: 833
Joined: Tue Mar 29, 2005 10:10 am
Location: Broken Hill

Re: Supercharged CBR250 build

Post by gennyshovel » Mon May 07, 2012 9:45 am

Sometimes, the smallest of achievements bring the biggest smiles :D
Cat bearing mounting compound,,nil,,,pulley removal,,one.
They don't lie when they tell ya 400 degrees is the amount of heat required to make this crap let go,,lol.
The plenum bleed is a go-er, todays job is a fiddly one, re-fitting 2 x 6mm bolts to the blower lower mounts that do a great job of hiding under, and behind everything they can :evil:
Image
Work has been doing it's best to keep me outa the shed the last couple of months, Lake G might be "plan A" this year (DRINK)
Tiny DLRA# 484
Postiebike Racing , created & funded by TwoBob Engineering

User avatar
gennyshovel
Posts: 833
Joined: Tue Mar 29, 2005 10:10 am
Location: Broken Hill

Re: Supercharged CBR250 build

Post by gennyshovel » Mon May 07, 2012 1:46 pm

After using a formula posted on landracing forum (thanks fellas) It became obvious the solenoid valve would not let enough fuel through to keep the thirsty 250 happy, so I made a remote shutoff.
Image
And got a british choke lever.
Image
Now the flow has gone from .6 ltr/min , to 2 ltr/min.
Tiny DLRA# 484
Postiebike Racing , created & funded by TwoBob Engineering

User avatar
RGV
Posts: 688
Joined: Sun Feb 06, 2011 9:17 pm
Location: Adelaide Hills

Re: Supercharged CBR250 build

Post by RGV » Mon May 07, 2012 2:10 pm

Nice bit of out of the square thinking Tiny. And the grips look fast.

Last Minute Racing
DLRA #928

2010 MPS/G 250 118 MPH
2011 Washed Out
2012 Washed Out
2013 MPS/G 250 131 MPH (RECORD)
2014 MPS/G 250 140 MPH (RECORD)
2015 MPS/F 250 DNF
2016 MPS/F 250 114 MPH (RECORD)
2017 MPS/F 250 DNF

grumm441
Posts: 522
Joined: Mon Nov 14, 2005 5:43 pm
Location: Buggery, a tidy town
Contact:

Re: Supercharged CBR250 build

Post by grumm441 » Mon May 07, 2012 7:57 pm

I like the fuel shutoff
However, I can't help but notice you are still running the crapest (is that word) kill lanyard available
G
They make it
I make it work

User avatar
gennyshovel
Posts: 833
Joined: Tue Mar 29, 2005 10:10 am
Location: Broken Hill

Re: Supercharged CBR250 build

Post by gennyshovel » Tue May 08, 2012 10:11 am

grumm441 wrote:I like the fuel shutoff
However, I can't help but notice you are still running the crapest (is that word) kill lanyard available
G
So far, so good with the lanyard Grumm, ya gotta take the time to make sure the rubber fits properly over the lip on the switch body, the postie video shows the lanyard cord just wafting around in the breeze @ 78 mph.
There's a fair chance a conrod will fly out before the lanyard flies off :wink:
Thanks for caring mate,,
Tiny DLRA# 484
Postiebike Racing , created & funded by TwoBob Engineering

Stayt`ie
Posts: 981
Joined: Fri May 13, 2005 11:47 pm
Location: Mackay

Re: Supercharged CBR250 build

Post by Stayt`ie » Tue May 08, 2012 6:29 pm

g'day Tiny,, i have found that its not so much the wind that affects them Lenyards, more the vibrations :roll: ,high frequency vibs tend to make 'em fall apart, but, if it works forya, 8)
First Australian to ride a motorcycle over 200mph at Bonneville,,,

harky
Posts: 208
Joined: Fri Feb 09, 2007 9:03 am
Location: Adelaide

Re: Supercharged CBR250 build

Post by harky » Tue May 08, 2012 7:39 pm

Here is my $0.02 worth, had one of those switches sitting ( with others ) I have , had it about 6 months and the red cap split ------- she no work no more ----- it would really p----s you off if it happened @ the lake .

Like the remote tap ----- real inovative ---- as is the rest of your the build
cant wait to hear and see it run
cheers
harky
harky
DLRA #643
so far 120mph for$2000---imagine how fast I can go for $20,000

Post Reply