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July 3rd, 2016, 04:18 AM   #11
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cheers Clive. 50+ are good years in that you can't physically do it so well anymore but really, you have great wisdom having just stepped off the machines yourself and can relate to what you work on.

we have a practice day next Sunday at Frome which is in the wrong direction for me but it should prove invaluable!

regards

Taffy
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July 12th, 2016, 12:48 AM   #12
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this one is perhaps worth reporting on it's own:

at the weekend we practiced at Frome, Somerset and experimented with a Belmouth, this went down as a big hit straight away and it is doubtful if I could prise it out of Rob's hands already! this gave stronger low speed and midrange.

those that raed my ditties will know how much I've advocated the blue belmouth over the years so this is just more info of the same.

we also ran into trouble with yet another plug losing the ground electrode (GE) - the 4th this year. after advice from NGK we have come to the conclusion that it is a mix of vibration and the GE softening its weld.

the easy way out is to go to a choice of plugs with NO G.I. or with a G.I aimed directly up from the threaded area. the three plugs are the IXU-01-27 which is a 9 heat race plug and the NGK R2349-9 or R2525-9. we have also bought some DCR9EIX plugs.

so we will let you know how they go!

Taffy
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July 12th, 2016, 04:54 PM   #13
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Hi Taffy

Great read , we are looking to come over maybe next year to race Sidecars in MX and the Welsh 2 day. I currently run a Berg 650 in Australia and was nearly going to move on but cant decide what to replace it with, seeing as your still pushing the Husaberg barrow I might stick with them.

Interesting the new WHT r/r suspension geometry is out

You've got 3 readers now keep up the reports,

Cheers

Wints
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July 12th, 2016, 11:42 PM   #14
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Hello Wints

you probably know that I rebuilt the engine for one of your countrymen three years ago (Warren Duthy). he did your 24 race on it and I believe it did one the following year as well - all without a rebuild!

I look forward to seeing you over here. the Husaberg is flying at the moment and people are now asking questions.... Rob is 49 and Dug 50 yet they ride very well.

this weekend we hope to be at Pen-y-Bont in East Mid-Wales which is a beautiful track and Rob has Luke Peters on the back. Luke, I believe has won either 5 or 6 British championships himself as a passenger.

we also hope to pick up two used springs of a heavier weight and will try these race plugs. i don't expect there will be a probelm though.....

just to let you know Wints, we are designing a better front fork and the word loop is being dropped as it will be a 'swing arm'. I hope to bring info to you towards the end of August - maybe September.

I'm also working on a superstrong clutch set-up which I can let you know about soon I hope!

regards

Taffy

Last edited by Taffy; July 12th, 2016 at 11:56 PM.
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July 21st, 2016, 09:22 AM   #15
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this past weekend we were at a small club meeting in east mid-wales called Penybont on the A44. there were only 8 outfits there and some were ancient but like all these things, the guys at the front had mustard kit with a big KTM and a Zabel.

I arrived late Saturday afternoon and walked the course and Rob arrived so I set to checking the linkage ratio on the rear and discovered for sure that the shock goes 'over cam' with 20% shock travel to go and that there is no rising rate at all. none!

so today I have ordered some stronger rear springs at 105N/mm and they will be a month coming.

we changed the inlet rubber so that it doesn't slip off the carb and called it a night.

race day and Rob gets just 2 - yes 2" - laps of practice which is the ACU minimumand enough time to know which way the corners go!

event 1
Rob gets away in 5th and pulls up to second behind the KTM, he then gets overtaken by Jamie Whitt on the Zabel and moves through to second when the KTM stops. JW wins by half a lap, Rob and Luke finish second.

Event 2
Rob gets off the line 2nd and gets stuck in behind the KTM, the Zabel loses patience and moves from 3rd to 1st, Rob can't get by the KTM no matter how hard he tries. this time though, the Zabel is an UNCOMFORTABLE 50m ahead. can't wait for event 3!

event 3
the Zabel leads off, KTM second and Rob third. they go downhill out of site and Rob's in second. the KTM disappears backwards = rider clearly shagged out and Rob sits behind the Whitt Zabel 700. at times Rob is on him, others the Zabel gets away. the one place Rob has him sussed is on the uphill straight where the 70hp Husey sucks the 80hp zabel back towards it.

either way though Rob can't get by and at the end of the day i'm delighted that Rob has had close races and has been completely stretched. so often he is on a space of track and learns nothing.

this week I have ordered a stronger rear spring to arrive in a Month. the lionkage system is completely wrong and muc of this is due to the angle of the shock. it all stems from the same trouble as a Husaberg solo or many other bikes... they need the shock to be short so that the carb can go to the airbox!

the thing is, the 2-strokes of course can have a tall shock and the airbox tunnel goes around the shock and inside the 'A' - a 4T would strike right at the top of the 'A'.

I could design a new linkage but for now we'll go for the stronger spring. perhaps it is a winter project!

with one race to go we swopped to Robs spare front shocks, remember we put the words 'front' and 'shocks' together because this is leading link don't forgot!

anyway, the cheaper shocks behaved just the same for half the money! so I brought the shocks home and re-shimmed them this week. they really are poorly shimmed. out of 9 shims, only 3 were working for their keep!

anyway, we'll see how they go this weekend if Rob 'is brave' and uses them.

we are also in the process of getting a larger carb at 43.5mm and a Q/A throttle which he really would like. the throttle not the carb....the carb I recommend!

we are also going to experiment with gearing the bike really low and use fourth instead!

there's a British Championship round this weekend and Dean Moor in Cumbria and we will be there!

regards

Taffy
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July 25th, 2016, 11:34 AM   #16
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Sunday 24th July
British ScX round 4 at Dean Moor, Cumbria

this week I took a set of rob's GP front shocks just to see what i could do with them. luckily he had tried his spare pair and liked them so that meant that I could get this pair wrong and all wouldn't be lost!

they are a very basic shock inside and have no bleed facility whatsoever other than through the remote chamber. this isn't nitrogen filled it has a bladder.

I have a little bicycle pump so I can pump them up with air but I had no idea of the pressures. so i copied the first rebuild to imitate the one I had yet to do but 2.5 bar seems a lot!

anyway, out of 9 shims on the comp side, only three were working so i soon sorted that out. I then set the clickers to the middle and Rob announced on Sunday that they were better and not so 'spikey'. job's a good 'un!

I persuaded rob that to leave corners at the lowest revs that would pull would be a good idea as it looked like the mist and drizzle were in for the day and except for 30 minutes, we never saw the sun all day! so we dropped from 53 to a 52T rear what with Scott being about 9-stones dripping!

anyway, Rob's new passenger was a young skinny bugger named Scott Lloyd - my namesake! Scott is as fit as a Butcher's dog - way too much shaggin' likely! anyway, he's a great lad and come with a few little ideas.

the lads placed an amazing 18th in practice, we are normally 26th or so!

the question was: could Rob get among that midfield cluster of about 8 of them!

well yes is the answer! in the first race, started in about 20th but after 3 laps were involved in a collision with a fallen rider and stopped because they were really concerned over his condition.

race two and all I needed to do to the suspension was take 10 off the front rebound and that meant the front shocks were done. at the back, the preload was taken back to the minimum for our light passenger.

Now Rob gated really well, like 11th, alas, he didn't take on a rider and so instead, everyone behind took on him! Rob dropped down dramatically and got about 18th - just in the points!

the Husaberg really does pull well, we are losing off some corners but we think that a new rear spring will help, other than that she is flying!

Race 3 is always Rob's best race of the day even at the age of 49. and so it turned out to be....

in race 3, the boys gated about 15th but then started to gain places, teams yet again, without proper suspension set-ups were starting to fade, riders were pinging passengers and some riders even bailed out and just left the passenger to it - from the back of the bike!

the boys finished 15th - a best ever performance for Rob and of that cluster of 8 we has beaten 5 of them and the 3 that beat us were just 25=50 yards in front at the flag.

I put Rob on to a special Keihin FCR43mm that has just finished on ebay and he got it for a song. I didn't think Keihin made one but the seller insists that the KTM 560SMR of 10 years ago came standard with one. anyone know the truth of it?

anyway, we will get that in the workshop: clean it, set it up, re jet it and let you know how it goes!

we were going to try a Q/A throttle but now that isn't considered such a good idea. we also have the stronger rear spring which we are having made here in the UK and should have in a Month.

15th overall out of 38 in the British ScX round - not bad!

regards

Taffy
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July 25th, 2016, 11:50 AM   #17
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This thread needs more pics!
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July 25th, 2016, 11:36 PM   #18
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Ktm 560 Smr Carb 43.5mm | eBay

here is the carb we bought?

is it a pup or the real deal is the question!

regards

Taffy
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July 25th, 2016, 11:50 PM   #19
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this is with steve in the chair in May at Wattisfield hall, my lewkel track!



this was owlesbury on Good Friday. pretty isn't she!

rgards

Taffy
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August 6th, 2016, 03:10 AM   #20
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well the carb turned out to be a load of bollocks and was just 41mm but at 90 I told Rob just to call the seller an "Idjut" as we want to keep it. right now we are trying to get it bored out by Mick my lewkel engineer. he has to decide if it can be held still.

we will make an alloy wrap where the old bolted in 'round hole' was bolted to the base in the middle and I reckon that will go well and then finally, the taper in and out i will attempt with a rotary flapper and a pair of internal calipers. patience my boy! patience!

in the meantime, I have laced a front 21" wheel rim. I won't say what size but it is WIDE. I have bought a Michelin Supercross 5 in the hard compound with a new clamp (of course - to go with the rim!) new inner Mich tube and we are testing it tomorrow against the 20" that the entire MX ScX run.

we are also doing the 4th gear experiment which includes another one I can't mention that is totally related. if it works we get a doouble whammy!! the idea is that after some maths, 4th becomes the new 3rd. the bike will be drastically geared down for this. we have to add the equivelant (including front at a value of 4 rear teeth) 12 teeth. the idea is that we come off the corners exactly as if the bike was in 3rd still.

the stronger rear spring is here, made in the UK and will be fitted but this passenger: 'Darren' is neither light Scott or heavy Dug so we will have tyo see!

I have also had a rod unique to ScX extended. the rod sits at the bottom of the solid front vertical fork. it is held against the leg with a loop of rubber cord. the idea is that you press down the back of the front loop and pivot the rod out, sit it in a cup and then the front end is lowered and solid.

this is an "anti-wheelie" contraption and until now, it has fallen out just by looking at it! this week we have put a threaded allen screw and lock nut up the end and we can adjust it to pop back against the leg when we hit the first decent bump. that's the theory anyway!

so, here we go!

Taffy

Last edited by Taffy; August 6th, 2016 at 03:17 AM.
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