Uphill Racers

Go Back   Uphill Racers > Technical > Engine & Chassis
Register FAQ Members List Calendar Downloads Mark Forums Read

Thread Tools Display Modes
Old 04-03-18, 16:12
sevaun's Avatar
sevaun sevaun is offline
Senior Member
Join Date: Oct 2008
Location: Bradford West Yorkshire
Posts: 1,683
sevaun will become famous soon enough
What constitutes a refresh?

I've often heard the term "refresh" in relation to bike engines in hill climb cars. Can anyone tell me what's actually involved ie is it new bearings, piston rings, head of valves checked etc etc etc or what?

Sevaun (Richard Vaughan)
Reply With Quote
Old 04-03-18, 16:52
Lolat492 Lolat492 is offline
Senior Member
Join Date: Apr 2010
Posts: 2,572
Lolat492 will become famous soon enough Lolat492 will become famous soon enough
For any combustion engine I've taken it as:
Brg, rings, grind valves, all new gaskets and seals ie valve guide seals, cam chain and guides.
Check cams and crank, small ends, oil pump dimensions if internal to engine.

All on/in the long block, no ancillaries.

Must depend on the engine to a large degree.
I would want it listed as to what is done.
Reply With Quote
Old 05-03-18, 19:38
gixxerthou gixxerthou is offline
Senior Member
Join Date: Dec 2009
Posts: 384
gixxerthou is on a distinguished road
I've seen a few 'rebuilt' bike engines, from a few professional sources. To some folk, it's an external jetwash, to others it's a full stripdown, inspection and rebuild, replacing anything thats questionable. A build sheet is only as reliable and honest as the professional that put it all together.... caveats and emptors, with lots of cynicism required.

I'd love to name some good, some bad, but you know what it's like in this world of litigation, plus it's only my experience which is worth nothing.
There's one fine example of a very expensive 'professionally' rebuilt engine that I'm looking at right now for someone, from a well-known builder. Approaching the builder (in this case as with others) simply leads to accusations and abuse, not a redress. It's a criminal world.

I'll attach a picture of an example of the quality of the above build for your amusement, but yes, 'rebuilt' in my book means everything looked at, assessed and replaced if any doubt exists.

Some engines require more attention in areas where there is a specific weakness, but generalities apply.
Attached Images
File Type: jpg lovely (Large).JPG (107.7 KB, 111 views)
File Type: jpg snow (Medium).JPG (89.7 KB, 110 views)
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 17:57.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright© 2007-2018 Uphill Racers www.uphillracers.com