Big Block Clones LLC
Big GX Clone Bare Block - 94mm Bore
Big GX Clone Bare Block - 94mm Bore
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You want big displacement? Get up to 500CCs with this 94mm bore block. This heavy duty block uses a 10-bolt crankcase cover and is reinforced with strengthening ribs and oil cooling fins on the bottom. Deck height is 175.2mm. Uses GX390 style cams and crankshafts and head bolt pattern.
There are several good combinations of pistons and rods that go with this block and our 72mm crank. Here is a table with part suggestions that can be used to assemble a 500cc stroker:
| Component: | Height in Inches | Height in MM |
| Deck height of BBC LLC Gen2 94mm block | 6.897" | 175.2mm |
| 72mm Stroke Crank Throw | 1.417" | 36mm |
| EC Pinnacle Rod 4.470" PN# 8272 | 4.470" | 113.538mm |
| JE Piston for DRZ400 PN# 183051 | 1" | 25.4mm |
| Total Compression Stack Height | 6.887" | 174.935mm |
| Amount piston is below zero deck with JE Forged piston for the DRZ400 with 1" compression height | 0.010" | 0.262mm |
You can also use a Niche 94mm piston for a DRZ400 and you will be 0.018" in the hole at TDC with the combination above. The Niche piston's part number is 13001-S006, and it is available from Amazon.
*NOTE that you will have to remove about 0.030" from the sides of the small end of the EC connecting rod to fit these pistons. It can be removed using a belt sander or the rod can be sent to a machine shop to be clearanced for the piston.*
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