Motomerlin — Merlin Motorcycles — Gas Gas — Pampera Prep & tune

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GAS GAS Pampera 250

The Pampera Story

tuning, racing the pamp

Hafren Pic

The 280: a brief report

Out of the in 2003 I got a call from Gas Gas UK got a one off 280 here do you want it? Only one the deal was done.

These not imported officially into UK due to issues. But mine had the Keihin straight off with 45/125 and runs superbly. Boyesen were fitted as I feel give the smoothest engine

Gearing. 11/41 for LDTs for proper trials. Used non chains for less drag more running costs. ). bars, sump plate set foot peg brackets complete the

Its been ridden in countless a few Sammy Miller rounds, the Greybeards trials and last (2005) I rode some Group Club trials, waiting for a new Beta trials to arrive. Its been totally — only using the service items — chains, pads etc. And soon its having its first

I often think about a Pre-65 Trials bike to LDTs etc — but then would I ride the Pamp? thoughts soon pass I recall what fun these are. Its a real shame been outlawed by the wonderful

Mike H.

Original text 2001.

Prep Tuning the 250 After six months of enforced (F M) I fancied a change of steed so out went the DRZ400E in came a lightweight Gas Gas Pampera 250.

In the past tried the one bike does all with a TT600R KTM 640. Now I the Pampera while its obviously a long distance tourer (!) and the punch and character of a big thumper, it lend itself to a bigger of off road competition disciplines.

Why a Pampera? Well there is no that lightweight is a good when riding off road. The comes in at circa 90 kg. Its nice and low is a good thing for shorties. It be a laugh to ride enduros on a light bike, sort of idea.

And, of course, I them, so a bit of promotion would do no

My first task was to prep for mainly competition use. are a few drawbacks associated with the retail price of this bike. Non O-ring chain, rims steel handlebars. So fitted security bolts clamps) one in the front two in the rear Added an o-ring chain the first outing.

Also bars Acerbis handguards.

the gearing stock. I fitted 2 links (o-ring) this allow rear wheel to be forward for trials use rearward for Dropped the forks through the so tops are level put one turn on the spring. To raise ride a bit — the low pegs catch in

Richened the std carburation by lowering the clip one notch — to the groove.

Stock jetting: 122, pilot 35, Needle D36 2 grooves from top.


Stock Gearing.

I have just fitted Aktive Reeds. The reeds a big difference — pulls better throughout the rev range. I’ll try a Keihin PWK28

I’ve used these on the Gassers with good BTW the aim of my tuning is to get more of the same and not the power characteristics too much. I the linear power — for grip makes life when you get knackered!

The last I want is to turn it into a revbox.

Also looking the viability of fitting a 272cc trials model) conversion.

now (18/11) fitted the Keihin carb — it fits a few minor mods. As expected it smooth clean running idle to WOT and the best bit is that small adjustment makes a Much better than the std Delorto. It will pull at part throttle on the road, no two stuttering and almost no popping on the Seems to make the bike but I doubt it increases the power

Faster pick up and a lighter pull. The Keihin came with slightly bigger than I used in the Trials and I doubt I’ll change as it runs so well. A mod for the perfectionist rider, possibly.

Keihin jetting: 45 pilot, 125 needle clip in middle

Not too sure of tank size/range (I it at — about 7 — 7.5 Recently it went from Hill to Midhurst via the South Way on reserve and then took 5.5 litres. So reserve arrives


( Note . latest have been arriving Michelin T63 trail tyres front rear, the first had Michelin trials rear MT21 front)

I used combinations depending on the events

Pirelli MT21s (rear — 18), Michelin 4 front Pirelli MT43

I removed the original Michelin trials rear sold it to a rider. These are wasted on a not so good on the road.

Fitted a Duro MX Excellerator for the Tidworth a later trail ride.

It was a 100/100 80 size but measured like 120mm width.

No with swing-arm clearance but it on front edge of rear when suspension compressed. So the tyre widths or move out a bit. The Duro is a very tyre and showed hardly any griped well in the snotty

But it has a very stiff sidewall is not so on roots rocks. Rode OK on the but legality on road dodgy.

( Of I’m happy to supply fit any of the above)

Heres one they earlier — Camozzi GLC Could this be the inspiration for the Mk3 Bruno Camozzi (French Ace works Gas Gas rider) rode a modified Mark 2 Pampera in the Lalay Enduro (known as the toughest event) and finished Scans from the French Moto Crampons (big though) Camozzi Rep1

If any reader could translate.

First do was the Witley Long Trial — a 70 mile of very wet Surrey/Hants green with 9 observed sections a test.

This was right up the street — soft gives huge grip. I was an MT43 Pirelli trials on the at 4 psi — thats why you need two bolts — and thats why it its grip. It was a doddle to ride in wet conditions, most of the time using a steady throttle and giving it a burst of power to through the slime now then.

I could see there is scope to the lock stops back to a better turning circle but nothing encountered on the Witley LDT was tight. We rode from to this event and the bike up 50-60 mph and returned about 50 mpg Result. 4th place


These rallies are fast — all forest firebreak with just a hint of off road thrown in. Ideal for an or similar. Only the trail class allows two strokes so I was in. If any would show up reliabilty this was it.

The poor little was screamed flat out from the off a 40 mile lap with two pretty river crossings. It ran perfectly both days (5 laps only stumbling once out of that deep water.

You its deep when it all goes (note: the Pamp has a trials airbox with small therefore more waterproof the open enduro/mx design) in the event the course got rougher showed up the limits of the relatively travel suspension (and my that aside it coped Again the soft power — rather than the out of corners a powerful bike the Pamp digs in, grips and the best of its modest power. 88th out of 200+ entrants.

Trophy S.E. Centre

GAS GAS Pampera 250

This was a time card in forestry near Basingstoke, a 9 mile lap. I was on Clubman B and the club fearing rain set times. Most of the entry clean the time checks and so the came down to the Special

Going was slippery tree muddy and in and out of 1001 trees. it was suited to the Pamperas nimble Every lap there were two to ride every lap riders of unwieldy tackle were to fall off! So each lap I past the queue, past the riders carried on, c/w smug Had to use a trials tyre on rear SE regs, used an old michelin ran at 7 psi.

Fitted Renthal Enduro bars — give a comfy riding postion a tad Result: 5th in class/silver.

Autumnal ride (well it is a trail A lap of Surrey/Hants Sussex lanes was — Plaistow, Devils and then out to Alton for Water a pint in Selbourne back via hill along South Way. It was almost going to (the plan. get back dark) until we tried the Butser Hill — the went up with lustyfoot gripping most of the way. My XR400 would not get even a of the way up.

He blamed the tyres (MT21s). JR on the Alp got two thirds of the way up only to have a on a barbed wire fence for a We were watched by some trailriders who didn’t seem so to try the hill. I rescued the Alp it impressed me its climbing abilities from a

By now darkness threatened and conveniently the hits reserve.

It made it to after riding most of the Downs Way in the dark, oh what The Pampera’s headlight was sort of off road but next door to in the bright halogen world of traffic. 25 measly watts!

now fitted a 45 watt bulb and its a big

Winston Grove Downland Trial

This was one of the Sammy British Bike Series — pre 65 trials with a for trailbikes.It was going to be the hardest test for the Pampera so far. signing on I found there two routes through the sections on I opted for the hard route JR Alp) took the easier route — as intended for I’d fitted a trials on the front, but had left the old trials on the rear (a mistake as I found out

Running out of prep time I the nice new Keihin carb on above) but really should of the near new Pirelli rear I Also this was the first trying the rearwheel in its forward — short wheelbase tighter you see. A really event.

38 sections in 13 groups over 40 of green lanes and backroads, spoilt by the dark grey

So how did the Pamp make out — only three times did I run out of lock, but three or four I wanted that newer The bike sumped out a couple of too, but I blame the nut on top of the saddle for There is scope to get more lock easily. The gearing was — first did for all sections.

If you keen on using the Pamp for trials, lower gearing give a better choice of at the expense of top gear cruising Trim those steering and fit trials bars. I was still enduro bars handguards. The suspension works well on hazards.

Festering in the corner of my is a Tiger Cub trials which not used for four years or so. I the prep and maintenace too time and even then you were not a fault free day. The makes a good alternative to this series — fuel range, comfy, enough in the sections very running with the new carb It would give a very ride on the sidecar route and well with most of the route sections.

Assuming the of the series event are of a similar I’m keen to try more year. Result: 5th in class


Sitting on the start 30 secs to go. Squeak Squeak, Oh great, that new tyre I yesterday fouls the silencer on bump of rear suspension. Not a start. I’d ridden Tidworth Super TT multilap once before, on the DRZ, so I it was a tough course.

Ditches. ruts whoops, as I believe you people call them, No rest for the rider — stand and ride man. To do you need a a fit MX bike fit MX bike with the speed nerve to over these hazards.

So, not me or my then. Its a real good of the riders stamina. The Pamp a much less tiring than the DRZ, due to the light as much as anything. (Although I do the DRZ justice really, I’m not enough for 3 hours on that).

After the first lap, I was into the Special test. A tight wiz around trees on a bank. Too lazy to get off the bike I asked for directions — up was the reply. So I caned it round the bend only to arrive at the start! Given a re-run.

I more attention to the markers and round, hoping I’d the right route. On lap 3 the rear faded out. Mud had moved the fluid was lost. Now this to the fun on downhills every corner no fourstroke engine braking to on. For a while I was overshooting corners, I remembered tempered entry

Managed to keep going the end clocked 8 laps in all.

Best Trail Bike fastest in special test of 150 riders).

Some conclusions . The will do service as a handy mount for the discerning Clubman or class rider. It can be made a half decent trials easily a competent rider ride normal club (easy route) with sucess. I hope to ride in the Greybeards trial next For Long Distance trials its so its like cheating!

And of course it is an trail bike easy to for all levels of rider.

Thats event reports for now, so I only update this when new technical info or come to light. Or the bike put through a particularly tough The intention is to ride more in 2002 probably a few Long Trials too.


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