Help: Speedfight & Trekker engine compatibility...

Bladerunner · 22-07-2008, 12:49

Hello

Have question regarding Speedfight & Trekker engine compatibility...

1. Anyone knows, are air-cooled & liquid-cooled variomat casing (crankshaft housing Left & Right) are compatible??? (let's say on Speedfight)

[img]

[/img]

& IMPORTANTLLY - can I combine left part (bigger - variomat) with right part (smaller - exhaust holder pictured above) from another engine???
(are they factory bored together - like car engine main bearings in block)

2. Has anyone did engine transplant from Trekker (in)to Speedfight??

The reason I am asking these, is following: I bought Speedfight 2 with his "usual" desease...:

[img]

[/img]

I'd welded this aluminum holder, but unfortunattely holder & exhaust were thrown away... (by previous owner servicer...)

Since my Speedfight is liquid-cooled, I just glanced over one AC Trekker in depo, and at first glance, did't seems same (compatible) to me...

So... If anyone have any expirience....

thanks

BR
Niksa

hac · 22-07-2008, 17:32

block from trekker before 2003 fits on SF before 2003.....main diference betwin blocks before/after 2003 is crank,it's diferent,big case is same,but small case iz diferent

on this pic uper blocs are trekker 2003 and lower SF 2005 blocks

Bladerunner · 22-07-2008, 21:08

Thanks for GREAT info...

This is mine - I'll put some more pictures tomorrow (camera battery empty - off course)

altough mfg year is 2002 - first reg dates 4/2003 - looks it is new type...

I'll dismantle engine completely tomorrow & post pictures here...

P.s how did you manage, to put pictures in large format here (looks much better than mine's) - what is the res?

Best regards
Niksa

hac · 23-07-2008, 08:46

Quote:

P.s how did you manage, to put pictures in large format here (looks much better than mine's) - what is the res?

800x600 res

on your pic is old blocks befere 2003 and if trekkers blocks are before 2003 it fits direct,plug & drive

Bladerunner · 24-07-2008, 16:34

Do you maybe know, why piston have such "shading" - pictured below ? (on car 4-stroke engines that is indication of piston ring overwear)

- Is it same with 2-stroke engines (1. piston ring gap clearance is 0,40 mm & 2. piston ring gap clearance is 0,35 mm)
- is this O.K. or it needs to be replaced?

So I need this part now & exhaust (muffler - silencer) - any idea where to look?

- I'm thinking to weld non original aluminum part, rather than finding used one, (since original is so un-reliable, anyway...) & maybe put some DIY exhaust...

- can you recommend me where to find any info regarding 2-stroke exhaust theory (backpressure, flow, etc....)

If you have any suggestions they're welcome...

BR

Niksa

22-07-2008, 12:49	#1 (permalink)
Bladerunner Registered User	Help: Speedfight & Trekker engine compatibility... Hello Have question regarding Speedfight & Trekker engine compatibility... 1. Anyone knows, are air-cooled & liquid-cooled variomat casing (crankshaft housing Left & Right) are compatible??? (let's say on Speedfight) [img][/img] & IMPORTANTLLY - can I combine left part (bigger - variomat) with right part (smaller - exhaust holder pictured above) from another engine??? (are they factory bored together - like car engine main bearings in block) 2. Has anyone did engine transplant from Trekker (in)to Speedfight?? The reason I am asking these, is following: I bought Speedfight 2 with his "usual" desease...: [img][/img] I'd welded this aluminum holder, but unfortunattely holder & exhaust were thrown away... (by previous owner servicer...) Since my Speedfight is liquid-cooled, I just glanced over one AC Trekker in depo, and at first glance, did't seems same (compatible) to me... So... If anyone have any expirience.... thanks BR Niksa

22-07-2008, 17:32	#2 (permalink)
hac Registered User	block from trekker before 2003 fits on SF before 2003.....main diference betwin blocks before/after 2003 is crank,it's diferent,big case is same,but small case iz diferent on this pic uper blocs are trekker 2003 and lower SF 2005 blocks __________________ The fastes peugeot scoot in Croatia

22-07-2008, 21:08	#3 (permalink)
Bladerunner Registered User	Thanks for GREAT info... This is mine - I'll put some more pictures tomorrow (camera battery empty - off course) altough mfg year is 2002 - first reg dates 4/2003 - looks it is new type... I'll dismantle engine completely tomorrow & post pictures here... P.s how did you manage, to put pictures in large format here (looks much better than mine's) - what is the res? Best regards Niksa Last edited by Bladerunner; 25-07-2008 at 04:10. Reason: picture downsizing

24-07-2008, 16:34	#5 (permalink)
Bladerunner Registered User	Do you maybe know, why piston have such "shading" - pictured below ? (on car 4-stroke engines that is indication of piston ring overwear) - Is it same with 2-stroke engines (1. piston ring gap clearance is 0,40 mm & 2. piston ring gap clearance is 0,35 mm) - is this O.K. or it needs to be replaced? So I need this part now & exhaust (muffler - silencer) - any idea where to look? - I'm thinking to weld non original aluminum part, rather than finding used one, (since original is so un-reliable, anyway...) & maybe put some DIY exhaust... - can you recommend me where to find any info regarding 2-stroke exhaust theory (backpressure, flow, etc....) If you have any suggestions they're welcome... BR Niksa