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TYGA MC21 SP Rothmans Special 

October 2009

This particular bike started off as a tired auction MC21 and desperately needed some loving attention to bring it back to full working order. We decided to strip the bike down and rebuild it into a daily ride, which would at a glance look completely stock but is actually packed with a lot of our latest TYGA parts as well as some old popular favourites too.

You will notice that the bodywork is actually MC28. We preferred the 28 shape to get the authentic Doohan NSR500 look. This was ordered brand new along with the fuel tank and is supplied from Honda all nicely stickered up so it saved us the usual dramas at the paint shop. The panels almost drop straight on the MC21.

MC21MC28

The main issues are that you need two stays for the front seat cowling positions from the subframe and we choose an MC28 subframe to move the fold down pegs further back to clear the seat cowling. The MC21 instrument just touches the screen so we put a foam pad on the top to protect it. Other than that, it is plain sailing and the Rothman's scheme gives the bike a very clean and fresh appearance.

Engine is rebuilt with new crankshaft, top end and clutch parts and runs stock porting. Performance enhancements were moderate with the bike treated to a set of GP stainless chambers with carbon/Kevlar silencers, VHM heads, carbon reeds fitted on hi-flo reed valves as per our power up kit. The 21 loom is spliced and runs a PGM III and the airbox lid modified and the carbs jetted to suit. The bike now puts out a healthy 62 horsepower at the rear wheel and pulls cleanly from around 2500 rpm. There is even enough grunt to carry a passenger through the traffic, though a passenger of course does upset the sweet handling of the NSR. 

Suspension has been worked on at both ends. At the front, the bike has TYGA full adjustment caps for enhanced setting and the forks themselves are held in TYGA CNC machined triple clamps. The rear shock is an MC21 SP unit which has been stripped and refilled with nitrogen. The remote reservoir has been modified by TYGA and has a special end piece fitted with a valve for easy refills. Stock springing is used throughout taking into consideration that this is a street bike first and foremost.

Braking is fairly conservative and in keeping with the stock credentials of the bike. The MC21 lowers on the forks have been replaced with MC28 ones so the SP2 calipers can be mounted directly. These bite on MC22 rotors which are the same size as stock and look prettier than the MC21 originals. The rear brake is rebuilt but otherwise stock. Stainless brake lines are fitted throughout.

The bike was put on a diet. The front meter stay and upper mirror stay have been replaced with TYGA aluminium ones. The rear sprocket holder is TYGA which saves a great deal over the stock one, as does an AFAM rear sprocket and of course the Magtek wheels have our lightweight wheel spacer kits fitted and were repainted white and fitted with Pirelli Dragon Corsa rubber. The clutch cover is carbon and together with the exhausts and triple clamps, there has been a considerable weight saving over stock. Other carbon parts include a TYGA rear hugger, radiator shrouds, meter and filler covers and heel guards. 

The bike is fitted with a host of other CNC parts such as the TYGA step kit which has solved the once sloppy gear change and significantly improved ground clearance. We also fitted CNC brake and clutch levers and lid for the front master cylinder top up tank. While we were shopping for new Honda parts, we also bought new top up tanks to replace the discoloured and stained top up tanks for the radiator, the auto lube and the front master cylinder. We also installed a new screen and all the body fasteners. Cables and bearings were replaced as a matter of course and most of the bolts and stays which were not replaced, were re-zinced or would look out of place on this very new looking 20 year old bike. 

So how does it ride? It just feels like a very taught and lively MC21 should do. The power builds up gradually and then the revs surge forward in good old two stroke fashion. It quite difficult to ride sensibly knowing there is that top end waiting for you to open the throttle but riding around at town speeds is a breeze. The dry clutch gets lot of attention at the lights from the locals on scooters who I am sure think the bike is about to go pop. Any thoughts of that are soon dismissed as soon as the lights turn green. The beauty of a bike like this is in most situations, it is king of the pile. It has performance advantages over almost anything in an urban environment and can turn much quicker than bigger bikes. It took a while for the brakes to bed in but now they have, the bike pulls up sharply with one finger. A track or twisty road test is next to push the tyres and suspension to the limit. I can't wait!

 

Below are some pictures of this bike with some prototype titanium coated stainless chambers fitted with our new carbon/blue silencers. Like them or not? Please let us know your opinions. 

 

Show: 

Set, Exhaust Chamber, GP Type, Stainless Steel, NSR250 MC21

Set, Exhaust Chamber, GP Type, Stainless Steel, NSR250 MC21

Constructed in stainless steel, TYGA Performance  combine modern technology and traditional techniques to bring you the best in…

Model
EXCS-0006A
Quantity
5
Silencer, Carbon/Kevlar, Two Stroke, Assy.

Silencer, Carbon/Kevlar, Two Stroke, Assy.

This high quality lightweight silencer ( 0.47kg) is made from CNC machined end caps joined by a carbon/Kevlar fiber…

Model
EXSL-0004
Quantity
33
Clutch Cover (Carbon) NSR250 SE/SP, Assy.

Clutch Cover (Carbon) NSR250 SE/SP, Assy.

Carbon cover to replace the nasty green plastic stock one on the NSR engines with dry clutch.  …

Model
BPCC-9006
Quantity
3
Carbon Meter Cover MC21, MC22, NC35, NC29, SC28

Carbon Meter Cover MC21, MC22, NC35, NC29, SC28

Attractive carbon cover for MC21 meter assembly. For fitment, simply remove adhesive backing and pop it on over the three foam…

Model
BPCC-0004
Quantity
35
Carbon Tank Filler Cap Cover Honda

Carbon Tank Filler Cap Cover Honda

Carbon Tank Filler cap Cover. Fits most Honda sports bikes including: MC18, MC21, MC22, MC28 NC23, NC29, NC30, NC35 Most other modern sports…

Model
BPCC-0002
Quantity
2
Racing Step Kit, MC21

Racing Step Kit, MC21

TYGA Performance racing step kit assembly. Designed in-house by TYGA Performance using AutoCAD software, these CNC machine- made step…

Model
STAA-0002A
Quantity
10
Heel/Brake Guard, Tyga, Right, (Carbon)

Heel/Brake Guard, Tyga, Right, (Carbon)

This lightweight carbon heelguard can be used as a direct replacement for the heavy steel one on the VJ22 RGV250.…

Model
BPCC-9002
Quantity
49
Radiator Shroud, Pair, Carbon, NSR250

Radiator Shroud, Pair, Carbon, NSR250

Radiator Shroud, Pair, Carbon, NSR250…

Model
BPCC-0011
Quantity
58
Rear Hugger (Carbon), NSR250 MC21, Assy.

Rear Hugger (Carbon), NSR250 MC21, Assy.

Rear Hugger (Carbon), NSR250 MC21, Assy. Stylish design cleverly uses existing mounting points to mount securely and neatly to…

Model
BPCH-0002
Quantity
6
Mini brake reservoir carbon

Mini brake reservoir carbon

This mini brake reservoir is the perfect final touch for a race or show bike. This Tyga Performance reservoir, unlike…

Model
BPAC-0005
Quantity
24
Meter Stay, MC21, Assy.

Meter Stay, MC21, Assy.

Direct replacement for stock item, 50% of the weight Compatible parts: All MC21 upper fairings …

Model
TYLY-0004
Quantity
5
Upper stay, MC21/MC28, Stock Type

Upper stay, MC21/MC28, Stock Type

Direct replacement for stock item, 50% of the weight Compatible Parts: Upper cowlings, Honda OEM MC21 and MC28, …

Model
TYLY-0003
Quantity
5
Top Triple Clamp, Race, CNC Black, NSR250

Top Triple Clamp, Race, CNC Black, NSR250

Top Triple Clamp, Race, CNC Black, NSR250 CNC machined top triple clamp for your NSR250. Designed and manufactured in…

Model
TYLY-1041
Quantity
12
Top Triple Clamp Nut (M24x1)

Top Triple Clamp Nut (M24x1)

Top clamp nut machined from 6061 T6 aluminium. Light weight and good looking. Clear anodised for a long lasting finish.   This…

Model
TYLY-0027
Quantity
80
Clutch Lever CNC Black, NSR250, CBR250RR

Clutch Lever CNC Black, NSR250, CBR250RR

CNC machined out of solid billet. Straight lever for NSR250 (MC18, MC21, MC28), CBR250RR (MC22) and similar models (See…

Model
LEVC-9011
Quantity
34
Wheel, Front. Aluminium Spacer kit

Wheel, Front. Aluminium Spacer kit

Replace the heavy steel front wheel spacers and wheel bearing distance spacer with these lightweight 6061-T6 aluminium spacers. At 35%…

Model
TPER-0024
Quantity
8
Wheel, Rear. Aluminium Spacer kit

Wheel, Rear. Aluminium Spacer kit

Replace the heavy steel rear wheel spacers and wheel bearing distance spacer with these lightweight 6061-T6 aluminium spacers. Lighter weight…

Model
TPER-0039
Quantity
13
Fork Caps, Full adjustment.

Fork Caps, Full adjustment.

Many race replica street bikes are graced with adjustable suspension as standard, but as with many 'so-called' adjustable suspension systems…

Model
TYLY-0038
Quantity
100+
Brake Reservoir Cap, CNC, Red, Nissin

Brake Reservoir Cap, CNC, Red, Nissin

This anodised CNC machined reservoir cap replaces the stock Nissin cap (Pt #45513-KV3-006, used on many models). We…

Model
TYLY-4049
Quantity
12
Sprocket Holder, CNC, Silver, MC21

Sprocket Holder, CNC, Silver, MC21

CNC machined TYGA sprocket holder for your NSR250 MC21R/SE/SP.   Designed and machined in house by…

Model
TYLY-1043
Quantity
15
Hi Flo reeds, MC21/MC28, Assy.

Hi Flo reeds, MC21/MC28, Assy.

Kit includes: * HRC style stuffer for improved intake mixture flow. * Reed stopper lifter plates to increase intake…

Model
TPER-0001
Quantity
11
Main Jet. Order from Left menu >By Product> Main Jet

Main Jet. Order from Left menu >By Product> Main Jet

Please see our comprehensive list of main jet sizes listed under 'by product' in our left hand menu…

Model
Many
Quantity
100+
VHM Cylinder Head Set NSR250 *

VHM Cylinder Head Set NSR250 *

VHM are a respected manufacturer of high quality racing parts used by factory teams world wide, and we are now…

Model
VHM-NSR250
Quantity
100+
Dry Clutch Rebuild Kit MC21/28 SE/SP, Assy.

Dry Clutch Rebuild Kit MC21/28 SE/SP, Assy.

For those dry clutch motors which have had some tuning work, sometimes the stock components are not up to…

Model
NHPS-0003
Quantity
2
Waterpump Rebuild Kit MC21/28, Assy.

Waterpump Rebuild Kit MC21/28, Assy.

All necessary seals and bearing to rebuild your NSR250SP/R waterpump. Please note that it is necessary to remove the clutch cover…

Model
NHPS-0008
Quantity
4
Bottom End/Crankshaft Rebuild Kit MC21/28 SE/SP, Assy.

Bottom End/Crankshaft Rebuild Kit MC21/28 SE/SP, Assy.

This comprehensive kit has been put together for ease of ordering all the necessary parts, gaskets & seals needed…

Model
NHPS-0006
Quantity
10
Top End Rebuild Kit MC21/28, Cyl B Assy.

Top End Rebuild Kit MC21/28, Cyl B Assy.

Below is everything you need to do a top end rebuild on your MC21/28. One kit includes all…

Model
NHPS-0001B
Quantity
13
Fastener, Quick Long M, MC28

Fastener, Quick Long M, MC28

Fastener, Quick Long M, MC28…

Model
64512-KV3-830
Quantity
17
Fastener, Quick Short, MC28

Fastener, Quick Short, MC28

Fastener, Quick Short, MC28…

Model
64507-MN4-000
Quantity
9
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