Scooter Shack Scooter Forum
The UK's biggest automatic scooter forum.
Scooter Shack is now a read-only archive. Over 20 years of scooter knowledge (2006–2026) is preserved here. New posts, replies and accounts are closed.
ForumsMain Scooter TopicsGeneral Scooter Discussion

Doing a engine re-build on my runner?

Discussion in General Scooter Discussion started by Burns, 17 Dec 2007
Burns#1
right, ordered my water pump kit today, obviously im going to have to strip and re-build the engine, what other parts shall i order?

when i go to pick up the water pump kit im going to order a full gasket set.
what else shall i get? might aswell do the bits now that have to strip it down again in a few weeks
Sw1fT#2
main bearings, crank depending on the mileage but i would strongly suggest it.
Burns#3
sweet il order main bearings aswell tomoro.

wont bother with the crank just yet because i might buy a performance crack + bore kit in the summer to get the bike a tad more power

i want it as a wheelie bike :nerd:
capri dave#4
would suggest an oil pump belt too...only a few quid ;)
Burns#5
already got one of those ;)
SR-STEF#6
crank seals if your doing mains.
alexsr70#7
i would suggest opening the engine up first, before you buy parts.
you dont know what you may need yet do you??
MiNoR cOnFuSiOn#8
are you planning on doing this yourself? as if so you will be needing a new crank in na coujple weeks..

not trying to get at anyone trying to build there first engfine, but if you have to ask what bits you need you obviously havent read enuff about building engines to attempt one.. anyone can bolt somthing together.. theres ALOT more to it than that.
Burns#9
ive built engines before, just never done a full engine rebuild of a watercooled 2stroke
MiNoR cOnFuSiOn#10
ok you understand my concerns then ;)

waterpump, gasgets, silicone sealant, new var/flywheel nuts. new engine bolts if there not stainless.. id use stainless barrel studs too as they tend to rust on the wc's...
couple bits here an there wouldent go a miss but im sure you will see whats needed when you struip it
J-Nitro#11
ive seen pictures on the dutch scooter forums of how to fit the cranks, it seems pretty ok if you take your time and buy all new renewables, heat cases up etc...

only thing that concerns me sometimes is like the timing of the crank and the ignition system, how could I go about learning how to do this (any 2 stroke books you reccomend? etc..)
Jamie#12
J-Nitro said:
ive seen pictures on the dutch scooter forums of how to fit the cranks, it seems pretty ok if you take your time and buy all new renewables, heat cases up etc...

only thing that concerns me sometimes is like the timing of the crank and the ignition system, how could I go about learning how to do this (any 2 stroke books you reccomend? etc..)

this might stupid but couldnt you just take a picture once the crank case has been split, and remember what position the standard crank was in, like a tiny pensil line where the shaft ended before you removed it? :emb:

or is it more complicated?
J-Nitro#13
i think.... the ignition system is set to a particular place during different postions of the crank so i gets a bit complicated? i think...
Jamie#14
ah right, just rememberd youve got to remove the stator aswell so it was abit of a stupid idea :emb:
MiNoR cOnFuSiOn#15
timoing is fixed on most scooters.. the cdi does all the advancing/retarding of the spark.

as for fitting a crank, you can watch all you like but you will never know what end float feels like unless your shown...

by all means everyone try.. i did a whole lot wrong befor i got it right tho
Burns#16
my plans for cranck are hammer and centre punch :rofl:

More threads in General Scooter Discussion

Aerox 100 vs other 125's Scooters31 replies22 Dec 2007
Stage 64 replies22 Dec 2007
throotle/oil cable ?0 replies20 Dec 2007
Result of not putting my engine back together properly:4 replies19 Dec 2007
Cheap Parts2 replies18 Dec 2007
Gilera VX125 value1 replies18 Dec 2007
50 to 1257 replies18 Dec 2007
battery6 replies18 Dec 2007
How much have you spent on your scooter/bike ?18 replies17 Dec 2007
Scooter for 200813 replies17 Dec 2007