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TYGA MC28 Power Up Kit        

 

It took an afternoon's work to get the humble, underpowered MC28 from 41.5hp up to 58.5hp. The following graphs show the stock MC28 against the same bike fitted with our kit.

This was all done without the HRC card. Keep reading to find out how. The major restriction of the MC28 is the ignition timing. An HRC card is required to re-time this to a more aggressive curve, but we wanted to find more power without it.The MC21 flywheel offers more advanced timing, so just by changing to this you can squeeze a couple of hp out.

However, the stock pipes are also very restrictive, with small, 30mm diameter rings welded into the headers. Throwing away the stock pipes and fitting a set of TYGA's give a major jump in power (12hp!)

Good work so far. How about taking another look at the ignition timing? The bike was then fitted again with the 21 flywheel and the TYGA pipes. More power!

The next obvious step is to fit Hi-Flo reed valves and a modified airbox, keeping the pipes and 21 flywheel in situ. A gain of another horsepower. Main Jet was increased to #155 for this test.

The final test was to fit the Carbon reeds to the existing set-up. Another small increase.

So there you have it. From 41.5hp up to 58.5hp. A gain of 17hp (41%). Remember, modifying your bike puts extra stress on all components, increasing the chance of failure and reducing the lifespan of everything from the piston rings to the sprockets. It may also make your bike illegal for road use! We advise that the base machine must be in good working condition before any changes are made, and careful jet setting should be performed at each stage.

 

The above tests should be used as a guide only. TYGA Performance accepts no responsibility for any machine damage, or personal injury or death resulting from these modifications

 

 

Parts needed as follows:

 

Show: 

Set, Exhaust Chamber, Side By Side Type, Stainless Steel, NSR250 MC28

Set, Exhaust Chamber, Side By Side Type, Stainless Steel, NSR250 MC28

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

Model
EXCS-0005B
Quantity
19
Silencer, Aluminium, Two Stroke, (Special), Assy.

Silencer, Aluminium, Two Stroke, (Special), Assy.

This aluminium two stroke silencer offers the same excellent value for money that our silencers always have but now…

Model
EXSL-9005
Quantity
100+
Silencer, Carbon, Two Stroke, Assy.

Silencer, Carbon, Two Stroke, Assy.

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

Model
EXSL-0003
Quantity
20
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
17
Collar, Manifold, NSR250 (Special)

Collar, Manifold, NSR250 (Special)

This is a special replacement part for the NSR250.  The manifold has a CNC machined…

Model
EXMN-9003
Quantity
18
Race Air Box Lid (Carbon), MC21/MC28

Race Air Box Lid (Carbon), MC21/MC28

Race Air Box Lid Carbon, MC21 The stock air box is restricted by the size of the inlet holes…

Model
BPCX-9010
Quantity
3
Race Airbox Lid (GRP), MC21/MC28

Race Airbox Lid (GRP), MC21/MC28

The stock airbox is restricted by the size of the inlet holes on the lid which limits the amountof power…

Model
BPFX-9010
Quantity
2
Gasket, Cylinder, 0.4mm NF5*

Gasket, Cylinder, 0.4mm NF5*

Gasket, Cylinder, 0.4mm NF5 Fits MC16~28. Use to adjust deck height/squish/compression ratio.…

Model
12191-NF5-610
Quantity
41
Gasket, Cylinder, 0.6mm NF5*

Gasket, Cylinder, 0.6mm NF5*

Gasket, Cylinder, 0.6mm NF5 Fits MC16~28. Use to adjust deck height/squish/compression ratio.…

Model
12193-NF5-610
Quantity
23
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
8
Ignition Rotor (Total Loss), MC28

Ignition Rotor (Total Loss), MC28

HRC style total loss ignition rotor for the NSR250 MC28. Simply remove the standard rotor and generator system and fit this…

Model
TPER-0040
Quantity
4
Power Jet #0, for NSR250 MC18/21/28.

Power Jet #0, for NSR250 MC18/21/28.

Power Jet #0, for NSR250 MC18/21/28. Replica part to replace HRC part: 99106-NKD-970   Use this jet to blank off the power…

Model
TPER-0005
Quantity
3
Woodruff Key, Offset, 1 Degree, NSR250

Woodruff Key, Offset, 1 Degree, NSR250

1 Degree offset woodruff key for NSR250. Allows simple advance/retard of stock ignition timing. *Important* Modifying ignition timing from standard setting may…

Model
TPER-1044
Quantity
51
Woodruff Key, Offset, 2 Degrees, NSR250

Woodruff Key, Offset, 2 Degrees, NSR250

2 Degrees offset woodruff key for NSR250. Allows simple advance/retard of stock ignition timing. *Important* Modifying ignition timing from standard setting may…

Model
TPER-2044
Quantity
24
Woodruff Key, Offset, 3 Degrees, NSR250

Woodruff Key, Offset, 3 Degrees, NSR250

3 Degrees offset woodruff key for NSR250. Allows simple advance/retard of stock ignition timing. *Important* Modifying ignition timing from standard setting may…

Model
TPER-3044
Quantity
43
Woodruff Key, Offset, 4 Degrees, NSR250

Woodruff Key, Offset, 4 Degrees, NSR250

4 Degrees offset woodruff key for NSR250. Allows simple advance/retard of stock ignition timing. *Important* Modifying ignition timing from standard setting may…

Model
TPER-4044
Quantity
58
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