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Engine Upgrades / Big Bore

Q & A for the 450cc, 477cc (and 510cc if you can afford it)
TopicsLast post
Reminder: Free Full Metal Head GasketBy sam20190 Replies · 188 ViewsLast post: 2 months ago · sam2019
Big Bore over Cams - pros and consBy sam20190 Replies · 242 ViewsLast post: 3 months ago · sam2019
In Conclusion: What is Possible with 477cc?By sam2019 · 17 Replies · 941 ViewsLast post: 5 months ago · Dool
Oil in airbox; Piston ring blowby?By Kurtis · 13 Replies · 214 ViewsLast post: 13 hours ago · sam2019
Dyno ResultsBy sam2019 · 236 Replies · 5,536 ViewsLast post: 1 day ago · Dool
86x86By Dool · 83 Replies · 1,407 ViewsLast post: 3 weeks ago · Dool
Head workBy sam2019 · 120 Replies · 3,157 ViewsLast post: 1 month ago · Dool
Full metal head gaskets are here!By sam2019 · 23 Replies · 497 ViewsLast post: 1 month ago · oldphart
1 month ago
oldphart
Stronger better quality clutch springsBy sam20193 Replies · 50 ViewsLast post: 1 month ago · Dool
Piston ring orderBy HimalayaBigBore · 13 Replies · 341 ViewsLast post: 2 months ago · Dool
Piston & Ring Gaps for 477By Reddy · 13 Replies · 325 ViewsLast post: 2 months ago · sam2019
BS6 / Euro5 2021 ECU locked? PT working?By sam2019 · 47 Replies · 1,217 ViewsLast post: 2 months ago · sam2019
Does the 477 need "enhanced clutch plates" or stronger springsBy sam20190 Replies · 66 ViewsLast post: 2 months ago · sam2019
Broken cylinder - now shipping in metal box!By sam20197 Replies · 188 ViewsLast post: 2 months ago · Kiwi59
ECU Maps PTBy Dool · 28 Replies · 908 ViewsLast post: 3 months ago · Dool
Emissions test with the 477By Firtan5 Replies · 94 ViewsLast post: 3 months ago · sam2019
Rings from Italy/Germany have arrived - and one 510 pistonBy sam20196 Replies · 110 ViewsLast post: 3 months ago · sam2019
477 plus stage 2 cam plus big valve headBy sam2019 · 23 Replies · 680 ViewsLast post: 4 months ago · Roy Gavin
4 months ago
Roy Gavin
Compression with our gaskets vs. OEMBy sam20196 Replies · 131 ViewsLast post: 4 months ago · sam2019
TrottleBody of 2022 tripper model videoBy sam20191 Reply · 119 ViewsLast post: 4 months ago · Dool
477cc StickerBy sam2019 · 23 Replies · 553 ViewsLast post: 5 months ago · Dool
Sound bitesBy sam2019 · 47 Replies · 989 ViewsLast post: 5 months ago · Dool
OH MY F*CKING GAWD - THE TORQUE IS SOOO AMAZING....By sam2019 · 21 Replies · 526 ViewsLast post: 5 months ago · Dool