Search found 56 matches

by spannerman
Mon Dec 16, 2019 11:46 am
Forum: Lambretta Tech
Topic: Granturismo 200cc piston oversize stockists
Replies: 13
Views: 1261

Re: Granturismo 200cc piston oversize stockists

Anybody know of who stocks oversize GT200 pistons ,I am at 66.5 (2nd oversize) need a piston at 3rd oversize (66.75) have got 4th oversize (67.0) but that has a slightly different crown height and will now cause me a headache if i use this ,so just putting feelers out after much looking and advice ...
by spannerman
Sun Dec 15, 2019 8:08 pm
Forum: Lambretta Tech
Topic: Granturismo 200cc piston oversize stockists
Replies: 13
Views: 1261

Re: Granturismo 200cc piston oversize stockists

Anybody know of who stocks oversize GT200 pistons ,I am at 66.5 (2nd oversize) need a piston at 3rd oversize (66.75) have got 4th oversize (67.0) but that has a slightly different crown height and will now cause me a headache if i use this ,so just putting feelers out after much looking and advice ...
by spannerman
Sun Dec 15, 2019 7:24 pm
Forum: Lambretta Tech
Topic: Granturismo 200cc piston oversize stockists
Replies: 13
Views: 1261

Re: Granturismo 200cc piston oversize stockists

holty wrote:
Sat Dec 14, 2019 7:45 pm
I presume you have tried Richard taylor ? I think they are a Yamaha piston, maybe banshee ?
Yep talked to Richard,he has given me the info as below , was hoping someone may have the third o/size piston at 66.75. thanks
by spannerman
Sun Dec 15, 2019 7:23 pm
Forum: Lambretta Tech
Topic: Granturismo 200cc piston oversize stockists
Replies: 13
Views: 1261

Re: Granturismo 200cc piston oversize stockists

also checked the DT175K compared to the RD350YPVS (piston used on original GT200's) on the TKRJ manual. This states a 0.5mm lower crown height on the DT175K piston. This would increase the port timings a little, if you send me port heights I can calculate what the effect would be or you could use s...
by spannerman
Sun Dec 15, 2019 7:18 pm
Forum: Lambretta Tech
Topic: Granturismo 200cc piston oversize stockists
Replies: 13
Views: 1261

Re: Granturismo 200cc piston oversize stockists

Rich_T wrote:
Sat Dec 14, 2019 8:43 pm
I checked this information again. According to Mitaka/Grampian data the DT175K piston has the same compression heights as the 350LC piston. The dome height is 1.5mm higher but that isn't the end of the world. Over-sizes for this piston will take you to 67.5mm as I understand.
Thanks Richard
by spannerman
Sun Dec 15, 2019 7:18 pm
Forum: Lambretta Tech
Topic: Granturismo 200cc piston oversize stockists
Replies: 13
Views: 1261

Re: Granturismo 200cc piston oversize stockists

holty wrote:
Sat Dec 14, 2019 7:45 pm
I presume you have tried Richard taylor ? I think they are a Yamaha piston, maybe banshee ?
Yep talked to Richard,he has given me the info as below , was hoping someone may have the third o/size piston at 66.75
by spannerman
Sat Dec 14, 2019 3:17 pm
Forum: Lambretta Tech
Topic: Granturismo 200cc piston oversize stockists
Replies: 13
Views: 1261

Granturismo 200cc piston oversize stockists

Anybody know of who stocks oversize GT200 pistons ,I am at 66.5 (2nd oversize) need a piston at 3rd oversize (66.75) have got 4th oversize (67.0) but that has a slightly different crown height and will now cause me a headache if i use this ,so just putting feelers out
by spannerman
Sat Apr 07, 2018 2:52 pm
Forum: Carburettor Set-ups
Topic: Atomiser modification
Replies: 3
Views: 1584

Re: Atomiser modification

As you have already said it been bored /drilled/reamed out by Harry Barlow ,so why would it be tapered, the difference between an AV and an AS atomiser is the height and can be altered easily
by spannerman
Thu Mar 22, 2018 10:42 pm
Forum: Lambretta Tech
Topic: AF 5 speed choice
Replies: 9
Views: 1882

Re: AF 5 speed choice

just starting doing the same myself, but with taffy pipe and amal carb. ive opted for the 34 tooth 5th and probably gonna use 18 front and 46 crown wheel
by spannerman
Fri Feb 23, 2018 8:57 pm
Forum: General Scooter Chat
Topic: Refueling routine. It's been a long time
Replies: 31
Views: 4771

Re: Refueling routine. It's been a long time

Well if you read most aftermarket kits they still quote 4%, probably to safe-guard themselves .though, personally I would stick to 4% on an iron barrel and 3% on nicasil lined ,yes oil is better these days ,so there is an argument either way, if your happy to drop your oil ratio on an expensive kit ...