derbi senda head gasket

[speedjunkie20...]

Right im getting my new bike on friday, it needs a new head gasket fitting, Ive got the gasket but was just wondering if I need any special tools to do it. Its a derbi senda drd 2005.

Cheers,

Alex

[Hutchysrs50]

not that i can think of for a cylinder head gasket.

i asume you will be fitting the full set, not just the ones on the cylinder head
(i mean the one that sits between the engine and the cylinder to stop water leaks etc..)

- just drain all the water out
- take the water pipes off that go to the cylinder head.
- Take the coil off the spark plug.
- take the 4 cylinder head stud bolts off.
- take the head off (might be abit tough if it hasnt been off for a long time, just try not to stick a screw driver in there as it can chip/wear down that part of the cylinder making it leak.
- Slide the cylinder off, watching the piston doesnt get damaged
- take the old gasket off the base of the engine and replace.
- put some 2 stroke oil on the piston rings/small end bearing/cylinder (a thin layer round should be fine)
- make sure the piston rings are sitting in the correct place and slide the cylinder head back on (put the piston so its just touching the cylinder, squeeze the rings tight and let the cylinder go down, might take awhile, but it has to be done correct.
- replace all the gaskets on the top (you will know which ones go where)
- pretty much everything els in reverse order

Good luck!
____________________
Gilera SC 125 - Current

[_sketch_]

If you want to be anal you could use a torque driver to do up the head bolts to the required torque (should be in the W/Shop manual)

Normally i just do them up bit by bit, corner to corner until i feel they are tight enough.
____________________
A sucker for 2 strokes
Cagiva Supermoto project

[_sketch_]

You forgot

- Cross your fingers and hope it doesn't leak.
____________________
A sucker for 2 strokes
Cagiva Supermoto project

[Hutchysrs50]

[speedjunkie20...]

Also forgot to say, it blew the original head gasket for some reason, yeah the things been ragged about but its a two stroke 50 so what dya expect lol. But its only done 4000 miles so I wouldnt expect it to just blow randomly, is there anything else I should check?

[Hutchysrs50]

[speedjunkie20...]

Nice one cheers, I just dont want to spend loads of money on parts for it because once im used to the bike im putting a hebo 80cc kit in it. Is that all I should check and should I not be worried as to why it went in the first place?

[Hutchysrs50]

[speedjunkie20...]

Why not bother is it just that its not very good, or its a waste of money for a 50? Because the money isnt a massive issue, I just couldnt decide between the hebo or malossi. I'm not really sure if it seized or blew, as far as im aware it just blew. A garage checked it and said that the head gasket had just blown. It was still riding just very slow, 20mph or so compared to 60 beforehand.

[Hutchysrs50]

[speedjunkie20...]

Yeah it turns over fine the garage said the piston rings are a little worn but not enough to warrant replacing and that it is just the head gasket. I fitted the last big bore kit, although it was on a ped, is there any big differences?

[Hutchysrs50]

[speedjunkie20...]

Because I have a 21mm carb fitted already and a pack of jets for that carb ile just do what I did last time and go through trying them one after the other.

[Hutchysrs50]

[speedjunkie20...]

Yeah I have a race exhaust, sports air filter, racing crank. Literally everything but a big bore kit

[Hutchysrs50]

[speedjunkie20...]

Yeah I thought about that aswell, I mean this is my third bike at the moment, although the only one with an mot...I thought about getting a dt125 if there any good

[Hutchysrs50]

[The Artist]

Speedjunkie? Riding a 125.. ok

why bother. I ride a fucking gs 125 which is slow as pgi shit but you know what fuckin it i cant be aresed to type more

[Hutchysrs50]

[The Artist]

[speedjunkie20...]

The main reason for getting it is so I can get used to using gears, then take my test and get something bigger. But insurance on a big bike at 17 with no, no claims... I would rather get a year or two and then get a bigger bike. Also would like to get my driving test out of the way aswell first..

[The Artist]

Exactly, you are doing what im doing. good.

Just dont bother "doing it up" keep it nice and original, better resale value in a year or 2 time.

[Hutchysrs50]