engine numbers

[raz1966]

does anyone know what the engine numbers are for mk 1 and mk2 crm250?
i got a mark 2 crm but when i checked the carb it has jetting for a mark 1.
i want to know if has an earlier engine or the wrong carb.
is there any difference between the engines?

[knackeredMk1]

Engine numbers follow frame numbers - viewtopic.php?f=20&t=5282&p=32257#p32257

There are differences between engines most of which are small. Most important is ignition timing.

[raz1966]

blimey that was quick, thanks for that, i should get it running tomorrow, once i do i am going for full rebuild, do you know anyone who has an ignition switch/speedo/idiot lights?

[back off road]

Knack is the forum GOD if he says it it is true it is , i am only an admin assistant and John is the brake GURU

FAQ section covers all things CRM

Jeram is covering the tuning section if it works( but i doubt it if his idea works i will eat humble pie)

and set about tuning mine

[knackeredMk1]

What BoR says isn't true I do make mistakes .

The CRM FAQs section is well worth reading. viewforum.php?f=20

Jeram is in the process of making a CR/CRM engine which will probably produce quite a bit more power than the original CRM. A lot depends on how well executed the modifications are made and how reliable the end product is.

[john7780]

Knack is the forum GOD if he says it it is true it is , i am only an admin assistant and John is the brake GURU

FAQ section covers all things CRM

Jeram is covering the tuning section if it works( but i doubt it if his idea works i will eat humble pie)

and set about tuning mine

yep i am the one and only brake guru

[raz1966]

where should the engine number be?

[knackeredMk1]

10 o'clock from the kickstarter shaft. Sticking out of the crancase.

[raz1966]

engine is mark one, frame is mark two, does it matter?

[knackeredMk1]

No.