Good news from me

Robbie,

If you quote a spec / model for the crank it could be added to the build a 175 page, especially as the Maico rods seem to be getting a bit harder to find

James

i can get maico rods

KTM duke rods are 125mm aswell

For me i would probably put something Honda RS/Yam TZ

Tim

bad times, dad had a second look at the powervalve forks with the cb wheel on, and said there's too much gap either side of the hub between it and the forks. however we have a backup plan based on Robbie's idea got a shopping list for when i come back from somerset, and gonna start chopping the extra bits off of the frame and brace it up i'll have a rolling chassis by september i reckon, if i attach some pedals i could ride it to 6th form

good luck to all at anglesey, have fun

Good luck from me too! I have decided to not come to Anglesey every season because it's just too far from sunny Wiltshire!

Tim

Hi James
the conrod is a seadoo 580 1996 part no CR 144 125mm
from wisco only thing is the crank pin has to be turned down a bit but not a too big job. we have been running this rod all season

Hi Robbie,

Sort of drifting away from con rods i saw your name and Michael's under the VMCC's Festival of 1000 Bikes sprint section. Was it good? I didn't see any pics except from the specials but it looked quite good. Didn't know you could use a race Bantam to use for a bit of sprinting! Anyway hope it was good.



Tim

Good news from me! I have sent the email to Andy C saying i will buy his bike! I have kindly asked him to knock it down to £550 from £600. So i am extremely chuffed with that!

Tim

ROBBIE wrote:

Hi James
the conrod is a seadoo 580 1996 part no CR 144 125mm
from wisco only thing is the crank pin has to be turned down a bit but not a too big job. we have been running this rod all season

That will explain your improved performance in the wet

James

So gearing for Anglesey???

ROBBIE wrote:

So gearing for Anglesey???

Checking my notes I have generally gone all Steve Frayne at Anglesey 15:54

This year depending on whether or not there is a force nine gale blowing I may try 16:56 or something.

If I was you Robbie on your Bike I would use 13:58

James

ROBBIE wrote:

Hi James
the conrod is a seadoo 580 1996 part no CR 144 125mm
from wisco only thing is the crank pin has to be turned down a bit but not a too big job. we have been running this rod all season

looks like grampian are going to be having a big order on tuesday from me, need some other bits from them as well.

finished the calliper today, s'all lacquered and ready for pads

also, i have a question about the ignition again. I have the dimensions to machine the shaft to take a motoplat system, and i remember hearing it's the same dimensions for pvl, but is it possible to just make the ignition fit a std bantam shaft??

how's the forks Zak? Heard that you changed the idea of RD's powervalve forks!

Tim

well, yeah thats an interesting fact lol, everything fits and would do nicely, but there's just too much darn clearance between the forks.

HOWEVER

i now have two possible options after talking to my dad about two possible options

1) buy thinner yokes, cut the spindle and make it work that way
2) go with an interesting idea that Robbie is trying at the moment, and just bore out the fork spindle diameter to 15mm to take my wheel and the powervalve spindle

we quickly decided option two as it's going to be cheaper, and we can work on option 1 while the bikes running, rather than have it without a front end and potentially miss track time and races

Hi Zak
The powervalve forks are far to long look at pics of all the races and note were the bottem part of the forks come

ROBBIE wrote:

Hi Zak
The powervalve forks are far to long look at pics of all the races and note were the bottem part of the forks come

I think you need to explain that a bit better Rob.
I am well out off date with modern parts and haven't got a clue what powervalve forks look like. But my bet is the bottom part is somewhere near the spindle.

Hi Ned the forks he got are yamaha LC 250/350 will get over to see Zak after back holiday before goes down the wrong road

Yamaha LC250/350 (1981 onwards) forks have 32mm stanchions. Yamaha YPVS 350 (1983 onwards) are 35mm, these are far too big and heavy for a little bantam

I still have my whole front end off my old green 256 racer (see main site), don't really want to sell it but if it helps another racer get out there I might sell it

ROBBIE wrote:

Hi Ned the forks he got are yamaha LC 250/350 will get over to see Zak after back holiday before goes down the wrong road

the plan was to adjust them through the yokes to make the front sit lower, but as i may have said (either on here on on my project blog, i can't remember) they aren't suitable for the reasons you guys have listed, too heavy, and too wide.

on a good note, my caliper's done neon orange and lacquered over found a disc suitable for the front wheel as well so that's on it's way. it's off of an Aprilia Rs 125, which is nice and big

Robbie, thanks for the offer of coming over it's very much appreciated

Tony thankyou for the offer, how much would i be looking at?? that could be a lot less hassle than what i'm doing

Hi Zak,
Stick with these boys, they will see you right!
How is the engine progressing?
Alan

it's still in bits, but i'm ordering some parts tomorrow, conrod, bearings, seals etc.

my dad found the engineer who used to do some machining on my dad's old production racer, and he's willing to make the shaft for the ignition and press the crank for me

We've been hunting in the loft for a blueprint for a Todd barrel that my dad used to have, and i also took a port map off of my brother's trials bantam. it was used for scramble and had light porting carried out after we've worked out a port map to start with, i shall talk to Mr White about one of his barrels I'm restoring the three cast iron barrels i was given, which i might use for testing different portings on a trackday, or as a paper weight, whichever seems more appropriate

so as of yet no progress on the engine, but tomorrow it's full steam ahead

license application's all filled out, just need to arrange a day to go to rugby to do that course

Hi Zak,
Avoid the iron barrels as if they have the plague!!!!!
They will create havoc and they are not easy to work with and get competitive with, as for the porting in a trials bantam... it bears no comparison to a racer. Best let Robbie advise, better still get a barrel from Brian White and you will be in the right area to begin with, and have somewhere to start from.
Iron Barrel = Paper weight
Cheers,
Alan

alan wrote:

Hi Zak,
Avoid the iron barrels as if they have the plague!!!!!
They will create havoc and they are not easy to work with and get competitive with, as for the porting in a trials bantam... it bears no comparison to a racer. Best let Robbie advise, better still get a barrel from Brian White and you will be in the right area to begin with, and have somewhere to start from.
Iron Barrel = Paper weight
Cheers,
Alan

haha as i said it was only going to be for testing on a trackday. i know the trials one is no comparison, but data is data i have the maps from the tuning guide as well.
i liked the idea of using an nsr400 intake to angle the carb away from the frame, and i have had an idea on how to reduce the loss of back pressure/charge out of the intake, as it doesn't have a reedblock to do this.

wonder if someone will buy the barrel's on ebay? i'm selling a seat and two std pipes as well which will go on later

I'll buy one of your barrels Zak.

how much? they need blasting by the way.