Motorcycle Sport Bike, Road Bike, Touring Bike, Cruiser Bike Plastic Fairing Repairs
Plastic Welding Repairs Ltd
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Headlight Lens Repairs
Hi, I am a specialist plastic
repairer based in Levin and I repair anything & everything but, I
especially enjoy sport, road bike semi rigid plastic repairs. See my
I advise anyone; NEVER attempt to glue or attack ANY plastic with a
soldering iron, it will not work, well, maybe, till just after the bike
is sold---- All Thermoplastics, as against ThermoSET plastics, are
temperature sensitive and have a narrow weld temp range, a non
adjustable soldering iron will burn & destroy the weld area. An
adjustable soldering iron will only 'MELD', it cannot perform a proper
weld but, if good technique is used may do a quick, just acceptable job
- not the ideal.
There is a confusion re 'gluing' and solvent or
chemical welding - a glue will simply sit on top of the substrate and
maybe, lock around some rough or edged areas, one nudge and it will
separate. Polyethylene >PE< and Polypropylene >PP< plastics
are completely impervious to Solvents/chemicals and therefore ALL &
any glues. Here's a clue; PP & PE are used to contain chemicals.
There are some expensive two part adhesives that with special
preparation can do a reasonable job on some plastics but I rarely use
The majority of road bikes utilize >ABS< type plastics which can
be hot-air or solvent welded. The problem with using hot-air on ABS is,
it warps, can crack while being welded even when pre-heated and, thin
areas will just blow away. This explains why many hot air welds fail -
the welder is afraid of blowing through so he limits the temperature
which causes a poor weld, he also wont weld both sides as a welder
should. These welds need a lot of Fibre Glass filler which makes the fairing
more rigid, less able to flex and is likely to crack quite easily.
Also, Urethane FG & most other fillers I have encountered do not
adhere to semi rigid plastics that well.
A good weld is where the substrate and the rod/weld material melt
at the correct temp or liquidity and adjoining molecules start holding
hands! It takes some knowledge/experience and excellent equipment to be
able do this on every weld.
On the other hand, Solvent welding ABS type plastics produces no
warping or cracks & therefore a minimum of refinishing. Extra
reinforcing material can be easily added where needed, tight areas can
be accessed, small lugs can be repaired & re attached, decals can
be better preserved. The only negatives for solvent welding are; there
is a curing time which increases with the thickness of added material.
Incorrect procedure can make repainting a problem. Aeration of the
added material has to be avoided to effect a strong weld, this can be
I have developed, through experience, the technology required to provide guaranteed repairs to ABS plastics.
Performance Sport or Road bikes may have front fairings made of nylon >PA<
(which has to be hot air welded only), others may be ABS or some alloy
mix like >PA/PBT<. All plastics have their own unique properties
and repair techniques, one plastic type cannot weld another.
Brian The Plastic Doctor
, Italian Motorcycle Plastics
, Jetski Plastic Repairs
, Motorcycle Repair
, Paint Protection Film
, Plastic Repair
, Plastic Welding
, Plastic Welding Repairs
, Quad 4x4 Plastics
, Road Bike Plastics
, Sport Bike Plastic Repairs
, Tail Light Lens Repairs