Please note that the last bomb-coupleuse from MALOSSI MHR, the famous BIG BORE 86cc exactly makes 86,39cc. It is only provided for the crankshaft reference 5313275 44mm race axis 13mm rod of 85mm length and MHR mark. It is reserved for the preparers of you. You will need to align transfers housings, highly équper engine and machine the skirt of housing in the crankcases for skirt diameter is greater than originally to pass the 50mm diameter preserving a good solidity.
Indications MALOSSI:
ATTENTION: To ensure the necessary rigidity to the thermal group, the cylinder has a diameter of insertion into the crankcase of 56.2 -0.1 / -0.2 mm. So it is necessary to alléser the housing with a boring bar of 56,7 + 0,0 / 0,1 mm to a depth of 21 mm.
MHR pulled out all the stops, a magnificent polished tapered cylinder head stud that even aesthetically is beautiful with its brands put on the 3D plot. The alloy and the treatment used are of the highest quality, really strong, so it is ideal for the preparation / finish unlike nykasil SIMONINI that it separates easily and is rather fragile. Its 50mm diameter piston is reinforced slightly prepared on the back for better filling / scan and is equipped with a reinforced segment cast KDN5 0.8mm curved chrome thickness. The cylinder offers 7 transfers and enormous exhaust has bar, the finish is excellent for a price so low on this type of cylinder. The kit is obviously comes with reinforced needle cage reinforced studs, several base gaskets to adjust your squish as it should. MHR therefore we output a monster torque with diagrams of 192 ° exhaust 132 ° inlet.
Data and advice MALOSSI MHR
Exhaust diagrams: 192 °
Admission charts: 132 °
Compression ratio: 1: 15.15
Combustion chamber volume: 6.1 cm3
Minimum / Maximum piston / cylinder Game: NC
Segment junction Spacing: 0.15mm
Recommended Squish: 0,80mm
Advance with ignition source: 16 °
Rigging advised with ignition MHR SELETRA: 2.6 mm
Recommended candle: W34 ES-ZU
You'll understand this kit is one of the most powerful of the market and its assembly / adjustment will ask you a lot of material, knowledge and a big budget. On competitions and runs, the others have better behave themselves, look more official figures announced by MALOSSI MHR:
Displacement: 86.40 cc
2 time
Compression ratio: 1: 15.15
Bore: 50 mm
Cooling: H2O "liquid"
Maximum power: 13,600 rpm 29 hp
Max torque: rpm 13,200 14.4 kgm
Carburetor recommended: 28mm VHST
We recommend to accompany this pack with minimum: Wholesale 26mm minimum carburetion kit, reinforced crankshaft 5313275 MHR reference only, ultra reinforced bearings, exhaust racing adapted to the diagrams of the kit, racing ignition internal rotor ... Have regret all the same that the segment junction passes in front of the rear central transfer because it creates premature wear!
The pack contains:
-4 studs
-pack of manifold gaskets for different épaisseures squish
yoke -plot
-Covers head
-pack complete joint
-cage reinforced needle
-piston reinforced D.50mm
Axis-reinforced piston d.13mm
piston -clips C reinforced
-segment reinforced hard chrome plated 0.8mm thickness e D.50mm
7 master cylinder aluminum exhaust transfers D.50mm bar
yoke -visserie
-livret maintenance / installation / manual
Optionally, we offer a preparation STAGE 1, this preparation includes a selection of the best part of our stock, a marked improvement in form and exhaust timing and a special touch to the skirt of the cylinder and piston for better scanning / filling according to our best essays. Improved lubrication and cooling bar (cross type) is made in passing to the plans obtained after preparation. This prep requires an additional period of 2 to 15 days depending on our availability! It requires tooling and around 4 to 5 hours of working on this cylinder. The price is accordingly.
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